Pub Date : 2025-11-19DOI: 10.1016/j.ijar.2025.109604
Alessio Benavoli , Alessandro Facchini , Marco Zaffalon
Exchangeability is a fundamental concept in probability theory and statistics. It allows to model situations where the order of observations does not matter. The classical de Finetti’s theorem provides a representation of infinitely exchangeable sequences of random variables as mixtures of independent and identically distributed variables. The quantum de Finetti theorem extends this result to symmetric quantum states on tensor product Hilbert spaces. It is well known that both theorems do not hold for finitely exchangeable sequences. The aim of this work is to investigate two lesser-known representation theorems, which were developed in classical probability theory to extend de Finetti’s theorem to finitely exchangeable sequences by using quasi-probabilities and quasi-expectations. With the aid of these theorems, we illustrate how a de Finetti-like representation theorem for finitely exchangeable sequences can be formulated through a mathematical representation which is formally equivalent to quantum theory (with boson-symmetric density matrices). We then show a promising application of this connection to the challenge of defining entanglement for indistinguishable bosons.
{"title":"Connecting classical finite exchangeability to quantum theory and indistinguishability","authors":"Alessio Benavoli , Alessandro Facchini , Marco Zaffalon","doi":"10.1016/j.ijar.2025.109604","DOIUrl":"10.1016/j.ijar.2025.109604","url":null,"abstract":"<div><div>Exchangeability is a fundamental concept in probability theory and statistics. It allows to model situations where the order of observations does not matter. The classical de Finetti’s theorem provides a representation of infinitely exchangeable sequences of random variables as mixtures of independent and identically distributed variables. The quantum de Finetti theorem extends this result to symmetric quantum states on tensor product Hilbert spaces. It is well known that both theorems do not hold for finitely exchangeable sequences. The aim of this work is to investigate two lesser-known representation theorems, which were developed in classical probability theory to extend de Finetti’s theorem to finitely exchangeable sequences by using quasi-probabilities and quasi-expectations. With the aid of these theorems, we illustrate how a de Finetti-like representation theorem for finitely exchangeable sequences can be formulated through a mathematical representation which is formally equivalent to quantum theory (with boson-symmetric density matrices). We then show a promising application of this connection to the challenge of defining entanglement for indistinguishable bosons.</div></div>","PeriodicalId":13842,"journal":{"name":"International Journal of Approximate Reasoning","volume":"189 ","pages":"Article 109604"},"PeriodicalIF":3.0,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145681530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-19DOI: 10.1016/j.ijar.2025.109605
Junbo Zhao , Lixin Han , Hong Yan
Few-shot image classification tackles recognizing new classes with limited training data. Despite the progress made by researchers in recent years, there are still challenges in dealing with data scarcity and improving model robustness. This paper presents FEICNet, a framework combining feature enhancement and adaptive weight control. Key innovations include: (1) MiniUNet (MUNet) — a compact network that enhances spatial and channel features through layered processing, and (2)Distribution of Feature Weights (DFW) – an adaptive weighting system that boosts critical features while filtering irrelevant patterns. Compatible with existing models without structural changes, the framework achieves strong performance across five benchmarks (MiniImageNet, tieredImageNet, StandfordDogs, CUB, StanfordCars). On StanfordCars, FEICNet outperforms Conv-64F methods by 13.4 % (1-shot) and 13.5 % (5-shot), surpassing ResNet-12 models by 9.7 % in 5-shot tests. Notably, when integrated as an embedding module, FEICNet elevates ProtoNets and Relation Networks by 19.6 %–28.8 % on StanfordDogs, demonstrating its effective plug-and-play capability. The framework exhibits consistent convergence across episodic training tasks, further evidencing its robustness. These advancements establish FEICNet as a significant contribution to few-shot image classification, particularly in resource-constrained environments and coarse- and fine-grained recognition scenarios. Overall, FEICNet provides a unified framework that bridges feature enhancement with adaptive weighting, offering new insights into few-shot image representation learning.
{"title":"Feature enhancement-based network for few-shot image classification","authors":"Junbo Zhao , Lixin Han , Hong Yan","doi":"10.1016/j.ijar.2025.109605","DOIUrl":"10.1016/j.ijar.2025.109605","url":null,"abstract":"<div><div>Few-shot image classification tackles recognizing new classes with limited training data. Despite the progress made by researchers in recent years, there are still challenges in dealing with data scarcity and improving model robustness. This paper presents FEICNet, a framework combining feature enhancement and adaptive weight control. Key innovations include: (1) MiniUNet (MUNet) — a compact network that enhances spatial and channel features through layered processing, and (2)Distribution of Feature Weights (DFW) – an adaptive weighting system that boosts critical features while filtering irrelevant patterns. Compatible with existing models without structural changes, the framework achieves strong performance across five benchmarks (MiniImageNet, tieredImageNet, StandfordDogs, CUB, StanfordCars). On StanfordCars, FEICNet outperforms Conv-64F methods by 13.4 % (1-shot) and 13.5 % (5-shot), surpassing ResNet-12 models by 9.7 % in 5-shot tests. Notably, when integrated as an embedding module, FEICNet elevates ProtoNets and Relation Networks by 19.6 %–28.8 % on StanfordDogs, demonstrating its effective plug-and-play capability. The framework exhibits consistent convergence across episodic training tasks, further evidencing its robustness. These advancements establish FEICNet as a significant contribution to few-shot image classification, particularly in resource-constrained environments and coarse- and fine-grained recognition scenarios. Overall, FEICNet provides a unified framework that bridges feature enhancement with adaptive weighting, offering new insights into few-shot image representation learning.</div></div>","PeriodicalId":13842,"journal":{"name":"International Journal of Approximate Reasoning","volume":"189 ","pages":"Article 109605"},"PeriodicalIF":3.0,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-19DOI: 10.1016/j.ijar.2025.109603
Guus Eelink , Kilian Rückschloß , Felix Weitkämper
Bayesian networks and causal models provide frameworks for reasoning about external interventions, enabling tasks that go beyond what probability distributions alone can support. Although these formalisms are often informally described as encoding causal knowledge, there is a lack of a formal theory that characterizes the kind of knowledge required to predict the effects of such interventions. This work introduces the theoretical framework of causal systems to implement Aristotle’s distinction between knowledge-that and knowledge-why within the setting of artificial intelligence. By interpreting existing AI technologies as causal systems, it examines the corresponding forms of knowledge they embody. Finally, it argues that predicting the effects of external interventions is possible only with knowledge-why, offering a more precise account of the assumptions underlying this capacity.
{"title":"How artificial intelligence leads to knowledge why: An inquiry inspired by Aristotle’s Posterior Analytics","authors":"Guus Eelink , Kilian Rückschloß , Felix Weitkämper","doi":"10.1016/j.ijar.2025.109603","DOIUrl":"10.1016/j.ijar.2025.109603","url":null,"abstract":"<div><div>Bayesian networks and causal models provide frameworks for reasoning about external interventions, enabling tasks that go beyond what probability distributions alone can support. Although these formalisms are often informally described as encoding causal knowledge, there is a lack of a formal theory that characterizes the kind of knowledge required to predict the effects of such interventions. This work introduces the theoretical framework of <em>causal systems</em> to implement Aristotle’s distinction between knowledge-<em>that</em> and knowledge-<em>why</em> within the setting of artificial intelligence. By interpreting existing AI technologies as causal systems, it examines the corresponding forms of knowledge they embody. Finally, it argues that predicting the effects of external interventions is possible only with knowledge-<em>why</em>, offering a more precise account of the assumptions underlying this capacity.</div></div>","PeriodicalId":13842,"journal":{"name":"International Journal of Approximate Reasoning","volume":"190 ","pages":"Article 109603"},"PeriodicalIF":3.0,"publicationDate":"2025-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145788263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-16DOI: 10.1016/j.ijar.2025.109601
Ruijing Cui, Jianbin Sun, Bingyu He, Kewei Yang, Bingfeng Ge
We focus on estimating the causal effects of continuous treatments, also known as the dose-response function. Current methods typically learn a treatment-agnostic representation for all covariates, without distinguishing between instrumental, confounding, and adjustment variables among the covariates. Although some researchers disentangle covariates to estimate treatment effects, these methods are limited to the binary treatment setting and fail to obtain independent disentangled factors. So, learning the underlying disentangled factors precisely remains an open problem. In this paper, we incorporate the disentangled representation into the setting of continuous treatment and propose a novel model for dose-response curve estimation. Mutual information estimators and Integral Probability Metric distances effectively ensure the independence for disentangled factors. Extensive results on synthetic and semi-synthetic datasets demonstrate that our model outperforms current state-of-the-art methods.
{"title":"Disentangled representations for continuous treatment effect estimation","authors":"Ruijing Cui, Jianbin Sun, Bingyu He, Kewei Yang, Bingfeng Ge","doi":"10.1016/j.ijar.2025.109601","DOIUrl":"10.1016/j.ijar.2025.109601","url":null,"abstract":"<div><div>We focus on estimating the causal effects of continuous treatments, also known as the dose-response function. Current methods typically learn a treatment-agnostic representation for all covariates, without distinguishing between instrumental, confounding, and adjustment variables among the covariates. Although some researchers disentangle covariates to estimate treatment effects, these methods are limited to the binary treatment setting and fail to obtain independent disentangled factors. So, learning the underlying disentangled factors precisely remains an open problem. In this paper, we incorporate the disentangled representation into the setting of continuous treatment and propose a novel model for dose-response curve estimation. Mutual information estimators and Integral Probability Metric distances effectively ensure the independence for disentangled factors. Extensive results on synthetic and semi-synthetic datasets demonstrate that our model outperforms current state-of-the-art methods.</div></div>","PeriodicalId":13842,"journal":{"name":"International Journal of Approximate Reasoning","volume":"189 ","pages":"Article 109601"},"PeriodicalIF":3.0,"publicationDate":"2025-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-15DOI: 10.1016/j.ijar.2025.109602
Jan Jakubův , Mikoláš Janota , Jelle Piepenbrock , Josef Urban
In this work we considerably improve the real-time performance of state-of-the-art SMT solving on first-order quantified problems by efficient machine learning guidance of quantifier selection. Quantifiers represent a significant challenge for SMT and are technically a source of undecidability. In our approach, we train an efficient machine learning model that informs the solver which quantifiers should be instantiated and which not. Each quantifier may be instantiated multiple times and the set of the currently active quantifiers changes as the solving progresses. Therefore, we invoke the ML predictor many times, during the whole run of the solver. To make this efficient, we use fast ML models based on gradient boosted decision trees. We integrate our approach into the state-of-the-art cvc5 SMT solver and show a considerable increase of the system’s holdout-set performance after training it on large sets of first-order problems. The method is tested in several ways, using both single-strategy and portfolio approaches. The evaluation is done on two large formal verification corpora: first-order problems created from the Mizar Mathematical Library, and first-order problems created from the HOL4 standard library.
{"title":"Machine learning for quantifier selection in cvc5","authors":"Jan Jakubův , Mikoláš Janota , Jelle Piepenbrock , Josef Urban","doi":"10.1016/j.ijar.2025.109602","DOIUrl":"10.1016/j.ijar.2025.109602","url":null,"abstract":"<div><div>In this work we considerably improve the real-time performance of state-of-the-art SMT solving on first-order quantified problems by efficient machine learning guidance of quantifier selection. Quantifiers represent a significant challenge for SMT and are technically a source of undecidability. In our approach, we train an efficient machine learning model that informs the solver which quantifiers should be instantiated and which not. Each quantifier may be instantiated multiple times and the set of the currently active quantifiers changes as the solving progresses. Therefore, we invoke the ML predictor many times, during the whole run of the solver. To make this efficient, we use fast ML models based on gradient boosted decision trees. We integrate our approach into the state-of-the-art cvc5 SMT solver and show a considerable increase of the system’s holdout-set performance after training it on large sets of first-order problems. The method is tested in several ways, using both single-strategy and portfolio approaches. The evaluation is done on two large formal verification corpora: first-order problems created from the Mizar Mathematical Library, and first-order problems created from the HOL4 standard library.</div></div>","PeriodicalId":13842,"journal":{"name":"International Journal of Approximate Reasoning","volume":"189 ","pages":"Article 109602"},"PeriodicalIF":3.0,"publicationDate":"2025-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-11DOI: 10.1016/j.ijar.2025.109590
Kehua Yuan , Yuji Bai , Duoqian Miao , Weiping Ding , Yiyu Yao , Hongyun Zhang , Witold Pedrycz
Multi-granularity computing for knowledge discovery has emerged as a remarkable paradigm in data mining and machine learning. As a representative method, granular-ball computing has attracted considerable attention due to its efficiency and adaptability in handling complex data distributions. However, most existing granularity-based approaches focus on intra-granular mutual information while neglecting the heterogeneity and overlapping phenomena across granularities. This limitation often leads to imprecise knowledge space construction and inaccurate uncertainty estimation in feature evaluation. To overcome this problem, this study proposes a novel and high-efficiency multi-granularity knowledge fusion framework for feature selection, incorporating an enhanced granular-ball generation mechanism and a newly designed granular-ball entropy (GB-E) uncertainty measure. Specifically, we first develop an enhanced granular-ball generation mechanism to construct multi-granularity knowledge space by incorporating class distribution information, thus achieving more accurate and flexible data partitioning. Subsequently, by jointly analyzing the separation and aggregation among granular balls, a novel granular-ball entropy is proposed to quantify uncertainty in the multi-granularity knowledge space. Compared with existing uncertainty measure methods, it provides a dual-perspective uncertainty characterization and effectively improves the accuracy of granularity information fusion. Furthermore, two feature significance measures based on the proposed GB-E measure are introduced for feature evaluation, and then a corresponding feature selection method is developed. Extensive experiments on multiple public datasets demonstrate the proposed method’s superior classification performance compared with several state-of-the-art approaches.
{"title":"Multi-granularity Knowledge Fusion for Feature Selection Using Granular-ball Entropy Uncertainty Measures","authors":"Kehua Yuan , Yuji Bai , Duoqian Miao , Weiping Ding , Yiyu Yao , Hongyun Zhang , Witold Pedrycz","doi":"10.1016/j.ijar.2025.109590","DOIUrl":"10.1016/j.ijar.2025.109590","url":null,"abstract":"<div><div>Multi-granularity computing for knowledge discovery has emerged as a remarkable paradigm in data mining and machine learning. As a representative method, granular-ball computing has attracted considerable attention due to its efficiency and adaptability in handling complex data distributions. However, most existing granularity-based approaches focus on intra-granular mutual information while neglecting the heterogeneity and overlapping phenomena across granularities. This limitation often leads to imprecise knowledge space construction and inaccurate uncertainty estimation in feature evaluation. To overcome this problem, this study proposes a novel and high-efficiency multi-granularity knowledge fusion framework for feature selection, incorporating an enhanced granular-ball generation mechanism and a newly designed granular-ball entropy (GB-E) uncertainty measure. Specifically, we first develop an enhanced granular-ball generation mechanism to construct multi-granularity knowledge space by incorporating class distribution information, thus achieving more accurate and flexible data partitioning. Subsequently, by jointly analyzing the separation and aggregation among granular balls, a novel granular-ball entropy is proposed to quantify uncertainty in the multi-granularity knowledge space. Compared with existing uncertainty measure methods, it provides a dual-perspective uncertainty characterization and effectively improves the accuracy of granularity information fusion. Furthermore, two feature significance measures based on the proposed GB-E measure are introduced for feature evaluation, and then a corresponding feature selection method is developed. Extensive experiments on multiple public datasets demonstrate the proposed method’s superior classification performance compared with several state-of-the-art approaches.</div></div>","PeriodicalId":13842,"journal":{"name":"International Journal of Approximate Reasoning","volume":"189 ","pages":"Article 109590"},"PeriodicalIF":3.0,"publicationDate":"2025-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-10DOI: 10.1016/j.ijar.2025.109598
Yingqi Qi , Chengxiang Hu , Xiaoling Huang
Traditional set-based methods for computing three-way regions in neighborhood systems primarily rely on the inclusion relationships between target concepts and neighborhood classes to process continuous numerical data. However, these methods exhibit significant limitations when applied to time-varying neighborhood information systems, as they inherently lack the capability to accommodate dynamically evolving data, effectively. To overcome this challenge, our research presents novel matrix-based incremental methods that leverage previously computed results to enable more efficient updating and maintenance of three-way regions in neighborhood rough sets. Through comprehensive integration and analysis of neighborhood information systems with a focus on varying attributes, we develop matrix-based incremental mechanisms. Building on these mechanisms, we propose two incremental algorithms to effectively handle dynamic numerical data. Experimental results demonstrate the effectiveness and superior efficiency of the proposed methods compared to existing approaches. Specifically, the proposed algorithms exhibit lower computational time and higher speed-up ratio, highlighting their efficiency for updating neighborhood three-way regions.
{"title":"Matrix-based efficient methods to update three-way regions in neighborhood systems under varying attributes","authors":"Yingqi Qi , Chengxiang Hu , Xiaoling Huang","doi":"10.1016/j.ijar.2025.109598","DOIUrl":"10.1016/j.ijar.2025.109598","url":null,"abstract":"<div><div>Traditional set-based methods for computing three-way regions in neighborhood systems primarily rely on the inclusion relationships between target concepts and neighborhood classes to process continuous numerical data. However, these methods exhibit significant limitations when applied to time-varying neighborhood information systems, as they inherently lack the capability to accommodate dynamically evolving data, effectively. To overcome this challenge, our research presents novel matrix-based incremental methods that leverage previously computed results to enable more efficient updating and maintenance of three-way regions in neighborhood rough sets. Through comprehensive integration and analysis of neighborhood information systems with a focus on varying attributes, we develop matrix-based incremental mechanisms. Building on these mechanisms, we propose two incremental algorithms to effectively handle dynamic numerical data. Experimental results demonstrate the effectiveness and superior efficiency of the proposed methods compared to existing approaches. Specifically, the proposed algorithms exhibit lower computational time and higher speed-up ratio, highlighting their efficiency for updating neighborhood three-way regions.</div></div>","PeriodicalId":13842,"journal":{"name":"International Journal of Approximate Reasoning","volume":"189 ","pages":"Article 109598"},"PeriodicalIF":3.0,"publicationDate":"2025-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145621173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-09DOI: 10.1016/j.ijar.2025.109597
Andrey G. Bronevich , Alexander E. Lepskiy
In the paper, we consider three possible types of external conflict in Dempster-Shafer theory and propose its measurement based on functionals evaluating intersection, inclusion and distance between random sets. All proposed functionals can be viewed as extensions of known functionals like Jaccard metric, Jaccard index, and Dice coefficient from usual sets to random sets based on the solutions of the Kantorovich problems.
{"title":"Measuring external conflict in Dempster-Shafer theory based on Kantorovich problems","authors":"Andrey G. Bronevich , Alexander E. Lepskiy","doi":"10.1016/j.ijar.2025.109597","DOIUrl":"10.1016/j.ijar.2025.109597","url":null,"abstract":"<div><div>In the paper, we consider three possible types of external conflict in Dempster-Shafer theory and propose its measurement based on functionals evaluating intersection, inclusion and distance between random sets. All proposed functionals can be viewed as extensions of known functionals like Jaccard metric, Jaccard index, and Dice coefficient from usual sets to random sets based on the solutions of the Kantorovich problems.</div></div>","PeriodicalId":13842,"journal":{"name":"International Journal of Approximate Reasoning","volume":"190 ","pages":"Article 109597"},"PeriodicalIF":3.0,"publicationDate":"2025-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145735356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Efficient computation of hard reasoning tasks is a key issue in abstract argumentation. One recent approach is to define approximate algorithms, i.e. methods that provide an answer that may not always be correct, but outperform the exact algorithms regarding the computation runtime. One such approach proposes to use the grounded semantics, which is polynomially computable, as a starting point for determining whether arguments are (credulously or skeptically) accepted with respect to various other extension-based semantics. In this paper, we push further this idea by defining a general family of approaches to evaluate the acceptability of arguments which are not in the grounded extension, neither attacked by it. These approaches rely on gradual semantics to evaluate these arguments. We also propose an approach using an heuristic based on the number of arguments attacked by or attacking an argument, and we show that this last approach, although seemingly different, is actually also an instance of our general family of approaches based on gradual semantics. We have implemented our approaches and provided an empirical study in which we discuss the results and compare our approach with the state-of-the-art approximate algorithms.
{"title":"ARIPOTER: Solvers for approximate reasoning based on grounded semantics","authors":"Jérôme Delobelle , Jean-Guy Mailly , Julien Rossit","doi":"10.1016/j.ijar.2025.109599","DOIUrl":"10.1016/j.ijar.2025.109599","url":null,"abstract":"<div><div>Efficient computation of hard reasoning tasks is a key issue in abstract argumentation. One recent approach is to define approximate algorithms, <em>i.e.</em> methods that provide an answer that may not always be correct, but outperform the exact algorithms regarding the computation runtime. One such approach proposes to use the grounded semantics, which is polynomially computable, as a starting point for determining whether arguments are (credulously or skeptically) accepted with respect to various other extension-based semantics. In this paper, we push further this idea by defining a general family of approaches to evaluate the acceptability of arguments which are not in the grounded extension, neither attacked by it. These approaches rely on gradual semantics to evaluate these arguments. We also propose an approach using an heuristic based on the number of arguments attacked by or attacking an argument, and we show that this last approach, although seemingly different, is actually also an instance of our general family of approaches based on gradual semantics. We have implemented our approaches and provided an empirical study in which we discuss the results and compare our approach with the state-of-the-art approximate algorithms.</div></div>","PeriodicalId":13842,"journal":{"name":"International Journal of Approximate Reasoning","volume":"189 ","pages":"Article 109599"},"PeriodicalIF":3.0,"publicationDate":"2025-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145577154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-02DOI: 10.1016/j.ijar.2025.109588
Sebastian Fuchs, Carsten Limbach, Fabian Schürrer
We explore how the classical concordance measures–Kendall’s , Spearman’s rank correlation , and Spearman’s footrule –relate to Chatterjee’s rank correlation when restricted to lower semilinear copulas. First, we provide a complete characterization of the attainable region for this class, thus resolving the conjecture of Maislinger and Trutschnig [1]. Building on this result, we then derive the exact and regions, obtain a closed-form relationship between and , and establish the exact region. In particular, we prove that never exceeds , , or . Our results clarify the relationship between undirected and directed dependence measures and reveal novel insights into the dependence structures that result from lower semilinear copulas.
{"title":"On exact regions between measures of concordance and Chatterjee’s rank correlation for lower semilinear copulas","authors":"Sebastian Fuchs, Carsten Limbach, Fabian Schürrer","doi":"10.1016/j.ijar.2025.109588","DOIUrl":"10.1016/j.ijar.2025.109588","url":null,"abstract":"<div><div>We explore how the classical concordance measures–Kendall’s <span><math><mi>τ</mi></math></span>, Spearman’s rank correlation <span><math><mi>ρ</mi></math></span>, and Spearman’s footrule <span><math><mi>ϕ</mi></math></span>–relate to Chatterjee’s rank correlation <span><math><mi>ξ</mi></math></span> when restricted to lower semilinear copulas. First, we provide a complete characterization of the attainable <span><math><mrow><mi>τ</mi><mspace></mspace><mo>−</mo><mspace></mspace><mi>ρ</mi></mrow></math></span> region for this class, thus resolving the conjecture of Maislinger and Trutschnig [1]. Building on this result, we then derive the exact <span><math><mrow><mi>τ</mi><mspace></mspace><mo>−</mo><mspace></mspace><mi>ϕ</mi></mrow></math></span> and <span><math><mrow><mi>ϕ</mi><mspace></mspace><mo>−</mo><mspace></mspace><mi>ρ</mi></mrow></math></span> regions, obtain a closed-form relationship between <span><math><mi>ξ</mi></math></span> and <span><math><mi>τ</mi></math></span>, and establish the exact <span><math><mrow><mi>τ</mi><mspace></mspace><mo>−</mo><mspace></mspace><mi>ξ</mi></mrow></math></span> region. In particular, we prove that <span><math><mi>ξ</mi></math></span> never exceeds <span><math><mi>τ</mi></math></span>, <span><math><mi>ρ</mi></math></span>, or <span><math><mi>ϕ</mi></math></span>. Our results clarify the relationship between undirected and directed dependence measures and reveal novel insights into the dependence structures that result from lower semilinear copulas.</div></div>","PeriodicalId":13842,"journal":{"name":"International Journal of Approximate Reasoning","volume":"189 ","pages":"Article 109588"},"PeriodicalIF":3.0,"publicationDate":"2025-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145464607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}