Pub Date : 2025-12-01Epub Date: 2025-09-26DOI: 10.1016/j.geomphys.2025.105665
Youming Chen, Liping Su
In this paper, we consider the Maurer–Cartan equation on holomorphic Poisson manifolds. For a differential graded Lie algebra (DGLA) associated with a holomorphic Poisson structure, we show the existence of its Maurer–Cartan elements under the assumption of the -lemma or -lemma, and discuss their uniqueness under gauge equivalence with certain topological restrictions.
{"title":"Maurer–Cartan elements on holomorphic Poisson manifolds","authors":"Youming Chen, Liping Su","doi":"10.1016/j.geomphys.2025.105665","DOIUrl":"10.1016/j.geomphys.2025.105665","url":null,"abstract":"<div><div>In this paper, we consider the Maurer–Cartan equation on holomorphic Poisson manifolds. For a differential graded Lie algebra (DGLA) associated with a holomorphic Poisson structure, we show the existence of its Maurer–Cartan elements under the assumption of the <span><math><mo>∂</mo><mover><mrow><mo>∂</mo></mrow><mrow><mo>¯</mo></mrow></mover></math></span>-lemma or <span><math><msub><mrow><mo>∂</mo></mrow><mrow><mi>π</mi></mrow></msub><mover><mrow><mo>∂</mo></mrow><mrow><mo>¯</mo></mrow></mover></math></span>-lemma, and discuss their uniqueness under gauge equivalence with certain topological restrictions.</div></div>","PeriodicalId":55602,"journal":{"name":"Journal of Geometry and Physics","volume":"218 ","pages":"Article 105665"},"PeriodicalIF":1.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145269915","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-09-29DOI: 10.1016/j.geomphys.2025.105664
Indranil Biswas , Sudarshan Gurjar
Let be an irreducible smooth projective curve defined over and a vector bundle on . We give a criterion for connections on the base change to to be the base change of some connection on . A similar criterion is given for Higgs fields on
设X0是一条定义在Q面上的不可约光滑投影曲线,E是X0上的向量束。我们给出了一个关于E⊗Q - C - X0×SpecQ的连接的基变化的准则E⊗Q - C上的连接是E上的一些连接的基变化的准则。对于E⊗Q - C上的希格斯场也给出了类似的准则
{"title":"Connections and Higgs bundles on curves defined over a number field","authors":"Indranil Biswas , Sudarshan Gurjar","doi":"10.1016/j.geomphys.2025.105664","DOIUrl":"10.1016/j.geomphys.2025.105664","url":null,"abstract":"<div><div>Let <span><math><msub><mrow><mi>X</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span> be an irreducible smooth projective curve defined over <span><math><mover><mrow><mi>Q</mi></mrow><mo>‾</mo></mover></math></span> and <span><math><mi>E</mi></math></span> a vector bundle on <span><math><msub><mrow><mi>X</mi></mrow><mrow><mn>0</mn></mrow></msub></math></span>. We give a criterion for connections on the base change <span><math><mi>E</mi><msub><mrow><mo>⊗</mo></mrow><mrow><mover><mrow><mi>Q</mi></mrow><mo>‾</mo></mover></mrow></msub><mi>C</mi><mspace></mspace><mo>⟶</mo><mspace></mspace><msub><mrow><mi>X</mi></mrow><mrow><mn>0</mn></mrow></msub><msub><mrow><mo>×</mo></mrow><mrow><mrow><mi>Spec</mi></mrow><mspace></mspace><mover><mrow><mi>Q</mi></mrow><mo>‾</mo></mover></mrow></msub><mrow><mi>Spec</mi></mrow><mspace></mspace><mi>C</mi></math></span> to <span><math><mi>C</mi></math></span> to be the base change of some connection on <span><math><mi>E</mi></math></span>. A similar criterion is given for Higgs fields on <span><math><mi>E</mi><msub><mrow><mo>⊗</mo></mrow><mrow><mover><mrow><mi>Q</mi></mrow><mo>‾</mo></mover></mrow></msub><mi>C</mi></math></span></div></div>","PeriodicalId":55602,"journal":{"name":"Journal of Geometry and Physics","volume":"218 ","pages":"Article 105664"},"PeriodicalIF":1.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145223055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-10-22DOI: 10.1016/j.geomphys.2025.105685
Xiaojian Shi, Xiaoqing Yue
The gap-p Virasoro algebra, which is closely related to the Heisenberg-Virasoro algebra and the algebra of derivations over a quantum torus, plays an important role in both mathematics and mathematical physics. In this paper, we first construct the gap-p Virasoro Lie conformal algebra from gap-p Virasoro algebra. Then we concretely determine the conformal derivations and conformal biderivations of this Lie conformal algebra. Furthermore, we investigate finite irreducible conformal modules and characterize nontrivial central extensions of . Based on these results, we finally give a complete classification of extensions of finite irreducible conformal modules over gap-p Virasoro Lie conformal algebra .
{"title":"Gap-p Virasoro Lie conformal algebra and extensions of modules","authors":"Xiaojian Shi, Xiaoqing Yue","doi":"10.1016/j.geomphys.2025.105685","DOIUrl":"10.1016/j.geomphys.2025.105685","url":null,"abstract":"<div><div>The gap-<em>p</em> Virasoro algebra, which is closely related to the Heisenberg-Virasoro algebra and the algebra of derivations over a quantum torus, plays an important role in both mathematics and mathematical physics. In this paper, we first construct the gap-<em>p</em> Virasoro Lie conformal algebra <span><math><msup><mrow><mi>HV</mi></mrow><mrow><mi>p</mi></mrow></msup></math></span> from gap-<em>p</em> Virasoro algebra. Then we concretely determine the conformal derivations and conformal biderivations of this Lie conformal algebra. Furthermore, we investigate finite irreducible conformal modules and characterize nontrivial central extensions of <span><math><msup><mrow><mi>HV</mi></mrow><mrow><mi>p</mi></mrow></msup></math></span>. Based on these results, we finally give a complete classification of extensions of finite irreducible conformal modules over gap-<em>p</em> Virasoro Lie conformal algebra <span><math><msup><mrow><mi>HV</mi></mrow><mrow><mi>p</mi></mrow></msup></math></span>.</div></div>","PeriodicalId":55602,"journal":{"name":"Journal of Geometry and Physics","volume":"218 ","pages":"Article 105685"},"PeriodicalIF":1.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145417179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-10-22DOI: 10.1016/j.geomphys.2025.105686
Yaxi Jiang, Chuangchuang Kang, Jiafeng Lü
-associative algebra is a generalization of associative algebra and is one of the four remarkable types of Lie-admissible algebras, along with associative algebra, left-symmetric algebra and right-symmetric algebra. This paper develops bialgebra theory for -associative algebras. We introduce Manin triples and bialgebras for -associative algebras, prove their equivalence using matched pairs of -associative algebras, and define the -associative Yang-Baxter equation and triangular -associative bialgebras. Additionally, we introduce relative Rota-Baxter operators to provide skew-symmetric solutions of the -associative Yang-Baxter equation.
{"title":"Manin triples, bialgebras and Yang-Baxter equation of A3-associative algebras","authors":"Yaxi Jiang, Chuangchuang Kang, Jiafeng Lü","doi":"10.1016/j.geomphys.2025.105686","DOIUrl":"10.1016/j.geomphys.2025.105686","url":null,"abstract":"<div><div><span><math><msub><mrow><mi>A</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>-associative algebra is a generalization of associative algebra and is one of the four remarkable types of Lie-admissible algebras, along with associative algebra, left-symmetric algebra and right-symmetric algebra. This paper develops bialgebra theory for <span><math><msub><mrow><mi>A</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>-associative algebras. We introduce Manin triples and bialgebras for <span><math><msub><mrow><mi>A</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>-associative algebras, prove their equivalence using matched pairs of <span><math><msub><mrow><mi>A</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>-associative algebras, and define the <span><math><msub><mrow><mi>A</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>-associative Yang-Baxter equation and triangular <span><math><msub><mrow><mi>A</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>-associative bialgebras. Additionally, we introduce relative Rota-Baxter operators to provide skew-symmetric solutions of the <span><math><msub><mrow><mi>A</mi></mrow><mrow><mn>3</mn></mrow></msub></math></span>-associative Yang-Baxter equation.</div></div>","PeriodicalId":55602,"journal":{"name":"Journal of Geometry and Physics","volume":"218 ","pages":"Article 105686"},"PeriodicalIF":1.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145417180","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-12-01Epub Date: 2025-09-23DOI: 10.1016/j.geomphys.2025.105653
Andrei Căldăraru , Tony Pantev , Eric Sharpe , Benjamin Sung , Xingyang Yu
In this paper we explore noninvertible symmetries in general (not necessarily rational) SCFTs and their topological B-twists for Calabi-Yau manifolds. We begin with a detailed overview of defects in the topological B model. For trivial reasons, all defects in the topological B model are topological operators, and define (often noninvertible) symmetries of that topological field theory, but only a subset remain topological in the physical (i.e., untwisted) theory. For a generic target space Calabi-Yau X, we discuss geometric realizations of those defects, as simultaneously A- and B-twistable complex Lagrangian and complex coisotropic branes on , and discuss their fusion products. To be clear, the possible noninvertible symmetries in the B model are more general than can be described with fusion categories. That said, we do describe realizations of some Tambara-Yamagami categories in the B model for an elliptic curve target, and also argue that elliptic curves can not admit Fibonacci or Haagerup structures. We also discuss how decomposition is realized in this language.
{"title":"Noninvertible symmetries in the B model TFT","authors":"Andrei Căldăraru , Tony Pantev , Eric Sharpe , Benjamin Sung , Xingyang Yu","doi":"10.1016/j.geomphys.2025.105653","DOIUrl":"10.1016/j.geomphys.2025.105653","url":null,"abstract":"<div><div>In this paper we explore noninvertible symmetries in general (not necessarily rational) SCFTs and their topological B-twists for Calabi-Yau manifolds. We begin with a detailed overview of defects in the topological B model. For trivial reasons, all defects in the topological B model are topological operators, and define (often noninvertible) symmetries of that topological field theory, but only a subset remain topological in the physical (i.e., untwisted) theory. For a generic target space Calabi-Yau <em>X</em>, we discuss geometric realizations of those defects, as simultaneously A- and B-twistable complex Lagrangian and complex coisotropic branes on <span><math><mi>X</mi><mo>×</mo><mi>X</mi></math></span>, and discuss their fusion products. To be clear, the possible noninvertible symmetries in the B model are more general than can be described with fusion categories. That said, we do describe realizations of some Tambara-Yamagami categories in the B model for an elliptic curve target, and also argue that elliptic curves can not admit Fibonacci or Haagerup structures. We also discuss how decomposition is realized in this language.</div></div>","PeriodicalId":55602,"journal":{"name":"Journal of Geometry and Physics","volume":"218 ","pages":"Article 105653"},"PeriodicalIF":1.2,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145321867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-01Epub Date: 2025-09-03DOI: 10.1016/j.geomphys.2025.105640
Guido Franchetti , Kirill Krasnov
We revisit the problem of determining the zero modes of the Dirac operator on the Eguchi-Hanson space. It is well known that there are no normalisable zero modes, but such zero modes do appear when the Dirac operator is twisted by a connection with normalisable curvature. The main novelty of our treatment is that we use the established formalism of spin-c spinors as complex differential forms, which makes the required calculations remarkably straightforward. In particular, to compute the Dirac operator we never need to compute the spin connection. As a result, we are able to reproduce the known normalisable zero modes of the twisted Eguchi-Hanson Dirac operator by relatively simple computations. We also collect various different descriptions of the Eguchi-Hanson space, including its construction as a hyperkähler quotient of with the flat metric. The latter illustrates the geometric origin of the connection with curvature used to twist the Dirac operator. To illustrate the power of the formalism developed, we generalise the results to the case of Dirac zero modes on the Ricci-flat Kähler manifolds obtained by applying Calabi's construction to the canonical bundle of .
{"title":"Eguchi-Hanson harmonic spinors revisited","authors":"Guido Franchetti , Kirill Krasnov","doi":"10.1016/j.geomphys.2025.105640","DOIUrl":"10.1016/j.geomphys.2025.105640","url":null,"abstract":"<div><div>We revisit the problem of determining the zero modes of the Dirac operator on the Eguchi-Hanson space. It is well known that there are no normalisable zero modes, but such zero modes do appear when the Dirac operator is twisted by a <span><math><mi>U</mi><mo>(</mo><mn>1</mn><mo>)</mo></math></span> connection with <span><math><msup><mrow><mi>L</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> normalisable curvature. The main novelty of our treatment is that we use the established formalism of spin-<em>c</em> spinors as complex differential forms, which makes the required calculations remarkably straightforward. In particular, to compute the Dirac operator we never need to compute the spin connection. As a result, we are able to reproduce the known normalisable zero modes of the twisted Eguchi-Hanson Dirac operator by relatively simple computations. We also collect various different descriptions of the Eguchi-Hanson space, including its construction as a hyperkähler quotient of <span><math><msup><mrow><mi>C</mi></mrow><mrow><mn>4</mn></mrow></msup></math></span> with the flat metric. The latter illustrates the geometric origin of the connection with <span><math><msup><mrow><mi>L</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> curvature used to twist the Dirac operator. To illustrate the power of the formalism developed, we generalise the results to the case of Dirac zero modes on the Ricci-flat Kähler manifolds obtained by applying Calabi's construction to the canonical bundle of <span><math><mi>C</mi><msup><mrow><mi>P</mi></mrow><mrow><mi>n</mi></mrow></msup></math></span>.</div></div>","PeriodicalId":55602,"journal":{"name":"Journal of Geometry and Physics","volume":"217 ","pages":"Article 105640"},"PeriodicalIF":1.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145026995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We provide conditions under which a Riemann surface X is the asymptotic boundary of a convex co-compact hyperbolic manifold, homeomorphic to a handlebody, of negative renormalized volume. We prove that this is the case when there are on X enough closed curves of short enough hyperbolic length.
{"title":"Filling Riemann surfaces by hyperbolic Schottky manifolds of negative volume","authors":"Tommaso Cremaschi , Viola Giovannini , Jean-Marc Schlenker","doi":"10.1016/j.geomphys.2025.105628","DOIUrl":"10.1016/j.geomphys.2025.105628","url":null,"abstract":"<div><div>We provide conditions under which a Riemann surface <em>X</em> is the asymptotic boundary of a convex co-compact hyperbolic manifold, homeomorphic to a handlebody, of negative renormalized volume. We prove that this is the case when there are on <em>X</em> enough closed curves of short enough hyperbolic length.</div></div>","PeriodicalId":55602,"journal":{"name":"Journal of Geometry and Physics","volume":"217 ","pages":"Article 105628"},"PeriodicalIF":1.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144925701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-01Epub Date: 2025-08-26DOI: 10.1016/j.geomphys.2025.105631
Romy Marie Merkel
We study special Lagrangian submanifolds in the Calabi–Yau manifold with the Stenzel metric, as well as calibrated submanifolds in the -manifold and the -manifold , both equipped with the Bryant–Salamon metrics. We twist naturally defined calibrated subbundles by sections of the complementary bundles and derive conditions for the deformations to be calibrated. We find that twisting the conormal bundle of by a 1-form does not provide any new examples because the Lagrangian condition requires μ to vanish. Furthermore, we prove that the twisted bundles in the - and -manifolds are associative (coassociative) and Cayley, respectively, if the base is minimal (negative superminimal) and the section holomorphic (parallel). This demonstrates that the (co-)associative and Cayley subbundles allow deformations destroying the linear structure of the fiber, while the base space remains of the same type after twisting. While the results for the two spaces of exceptional holonomy are in line with the findings in Euclidean spaces established by Karigiannis and Leung (2012), the special Lagrangian bundle construction in is much more rigid than in the case of .
{"title":"Deformations of calibrated subbundles in noncompact manifolds of special holonomy via twisting by special sections","authors":"Romy Marie Merkel","doi":"10.1016/j.geomphys.2025.105631","DOIUrl":"10.1016/j.geomphys.2025.105631","url":null,"abstract":"<div><div>We study special Lagrangian submanifolds in the Calabi–Yau manifold <span><math><msup><mrow><mi>T</mi></mrow><mrow><mo>⁎</mo></mrow></msup><msup><mrow><mi>S</mi></mrow><mrow><mi>n</mi></mrow></msup></math></span> with the Stenzel metric, as well as calibrated submanifolds in the <span><math><msub><mrow><mtext>G</mtext></mrow><mrow><mn>2</mn></mrow></msub></math></span>-manifold <span><math><msubsup><mrow><mi>Λ</mi></mrow><mrow><mo>−</mo></mrow><mrow><mn>2</mn></mrow></msubsup><mo>(</mo><msup><mrow><mi>T</mi></mrow><mrow><mo>⁎</mo></mrow></msup><mi>X</mi><mo>)</mo></math></span> <span><math><mo>(</mo><msup><mrow><mi>X</mi></mrow><mrow><mn>4</mn></mrow></msup><mo>=</mo><msup><mrow><mi>S</mi></mrow><mrow><mn>4</mn></mrow></msup><mo>,</mo><msup><mrow><mi>CP</mi></mrow><mrow><mn>2</mn></mrow></msup><mo>)</mo></math></span> and the <span><math><mtext>Spin</mtext><mo>(</mo><mn>7</mn><mo>)</mo></math></span>-manifold <figure><img></figure>, both equipped with the Bryant–Salamon metrics. We twist naturally defined calibrated subbundles by sections of the complementary bundles and derive conditions for the deformations to be calibrated. We find that twisting the conormal bundle <span><math><msup><mrow><mi>N</mi></mrow><mrow><mo>⁎</mo></mrow></msup><mi>L</mi></math></span> of <span><math><msup><mrow><mi>L</mi></mrow><mrow><mi>q</mi></mrow></msup><mo>⊂</mo><msup><mrow><mi>S</mi></mrow><mrow><mi>n</mi></mrow></msup></math></span> by a 1-form <span><math><mi>μ</mi><mo>∈</mo><msup><mrow><mi>Ω</mi></mrow><mrow><mn>1</mn></mrow></msup><mo>(</mo><mi>L</mi><mo>)</mo></math></span> does not provide any new examples because the Lagrangian condition requires <em>μ</em> to vanish. Furthermore, we prove that the twisted bundles in the <span><math><msub><mrow><mtext>G</mtext></mrow><mrow><mn>2</mn></mrow></msub></math></span>- and <span><math><mtext>Spin</mtext><mo>(</mo><mn>7</mn><mo>)</mo></math></span>-manifolds are associative (coassociative) and Cayley, respectively, if the base is minimal (negative superminimal) and the section holomorphic (parallel). This demonstrates that the (co-)associative and Cayley subbundles allow deformations destroying the linear structure of the fiber, while the base space remains of the same type after twisting. While the results for the two spaces of exceptional holonomy are in line with the findings in Euclidean spaces established by Karigiannis and Leung (2012), the special Lagrangian bundle construction in <span><math><msup><mrow><mi>T</mi></mrow><mrow><mo>⁎</mo></mrow></msup><msup><mrow><mi>S</mi></mrow><mrow><mi>n</mi></mrow></msup></math></span> is much more rigid than in the case of <span><math><msup><mrow><mi>T</mi></mrow><mrow><mo>⁎</mo></mrow></msup><msup><mrow><mi>R</mi></mrow><mrow><mi>n</mi></mrow></msup></math></span>.</div></div>","PeriodicalId":55602,"journal":{"name":"Journal of Geometry and Physics","volume":"217 ","pages":"Article 105631"},"PeriodicalIF":1.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144911770","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-01Epub Date: 2025-07-25DOI: 10.1016/j.geomphys.2025.105603
Giovanni Calvaruso, Lorenzo Pellegrino
We investigate the geometry of surfaces in three-dimensional homogeneous non-symmetric plane waves. In particular, we obtain the full classification and explicit description of their totally geodesic and parallel examples and prove the nonexistence of proper totally umbilical surfaces. Moreover, we characterize their minimal surfaces, providing some explicit examples.
{"title":"Surfaces of three-dimensional homogeneous plane waves","authors":"Giovanni Calvaruso, Lorenzo Pellegrino","doi":"10.1016/j.geomphys.2025.105603","DOIUrl":"10.1016/j.geomphys.2025.105603","url":null,"abstract":"<div><div>We investigate the geometry of surfaces in three-dimensional homogeneous non-symmetric plane waves. In particular, we obtain the full classification and explicit description of their totally geodesic and parallel examples and prove the nonexistence of proper totally umbilical surfaces. Moreover, we characterize their minimal surfaces, providing some explicit examples.</div></div>","PeriodicalId":55602,"journal":{"name":"Journal of Geometry and Physics","volume":"217 ","pages":"Article 105603"},"PeriodicalIF":1.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738584","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2025-11-01Epub Date: 2025-08-08DOI: 10.1016/j.geomphys.2025.105622
Aleksandra Marinković
As shown by Etnyre and Honda ([2]), every contact 3-manifold admits infinitely many concave symplectic fillings that are mutually not symplectomorphic and not related by blow ups. In this note we refine this result in the toric setting by showing that every contact toric 3-manifold admits infinitely many concave symplectic toric fillings that are mutually not equivariantly symplectomorphic and not related by blow ups. The concave symplectic toric structure is constructed on certain linear and cyclic plumbings over spheres.
{"title":"Concave symplectic toric fillings","authors":"Aleksandra Marinković","doi":"10.1016/j.geomphys.2025.105622","DOIUrl":"10.1016/j.geomphys.2025.105622","url":null,"abstract":"<div><div>As shown by Etnyre and Honda (<span><span>[2]</span></span>), every contact 3-manifold admits infinitely many concave symplectic fillings that are mutually not symplectomorphic and not related by blow ups. In this note we refine this result in the toric setting by showing that every contact toric 3-manifold admits infinitely many concave symplectic toric fillings that are mutually not equivariantly symplectomorphic and not related by blow ups. The concave symplectic toric structure is constructed on certain linear and cyclic plumbings over spheres.</div></div>","PeriodicalId":55602,"journal":{"name":"Journal of Geometry and Physics","volume":"217 ","pages":"Article 105622"},"PeriodicalIF":1.2,"publicationDate":"2025-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144861011","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}