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Vietnam Journal of Mathematics最新文献

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Real Characters in Nilpotent Blocks 幂零块中的真实字符
IF 0.8 Q2 Mathematics
Vietnam Journal of Mathematics
Pub Date : 2023-01-31 DOI: 10.1007/s10013-023-00623-5
Benjamin Sambale
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引用次数: 1
Sylow Branching Coefficients and Hook Partitions Sylow分支系数和Hook分区
IF 0.8 Q2 Mathematics
Vietnam Journal of Mathematics
Pub Date : 2023-01-18 DOI: 10.1007/s10013-023-00624-4
E. Giannelli, Giada Volpato
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引用次数: 0
Finite-Dimensional Nilpotent Lie Algebras with Central Derivations of Nonminimal Dimensions 具有非极小维中心导子的有限维幂零李代数
IF 0.8 Q2 Mathematics
Vietnam Journal of Mathematics
Pub Date : 2023-01-18 DOI: 10.1007/s10013-022-00605-z
S. M. Moosavinejad, F. Saeedi
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引用次数: 0
On Positivity Sets for Helmholtz Solutions 关于Helmholtz解的正集
IF 0.8 Q2 Mathematics
Vietnam Journal of Mathematics
Pub Date : 2023-01-12 DOI: 10.1007/s10013-023-00646-y
Pu-Zhao Kow, M. Salo, H. Shahgholian
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引用次数: 1
Necessary Optimality Conditions for Vector Reverse Convex Minimization Problems via a Conjugate Duality 向量反凸极小问题的共轭对偶最优性必要条件
IF 0.8 Q2 Mathematics
Vietnam Journal of Mathematics
Pub Date : 2023-01-10 DOI: 10.1007/s10013-022-00602-2
Houda Keraoui, A. Aboussoror
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引用次数: 0
Pell–Lucas Discretization Method for Finding the Solution of Caputo–Fabrizio Time-Fractional Diffusion Equations 求解Caputo-Fabrizio时间分数扩散方程的Pell-Lucas离散化方法
IF 0.8 Q2 Mathematics
Vietnam Journal of Mathematics
Pub Date : 2023-01-10 DOI: 10.1007/s10013-022-00601-3
Haniye Dehestani, Y. Ordokhani
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引用次数: 0
Periodic Motions of the Non-autonomous Oseen–Navier–Stokes Flows Past a Moving Obstacle with Data in Lp-Spaces Lp空间中非自治Oseen–Navier–Stokes流通过移动障碍物的周期运动
IF 0.8 Q2 Mathematics
Vietnam Journal of Mathematics
Pub Date : 2023-01-09 DOI: 10.1007/s10013-022-00599-8
Thieu Huy Nguyen, Thi Kim Oanh Tran
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引用次数: 0
On the Controllability of Entropy Solutions of Scalar Conservation Laws at a Junction via Lyapunov Methods 用Lyapunov方法研究结点处标量守恒律熵解的可控性
IF 0.8 Q2 Mathematics
Vietnam Journal of Mathematics
Pub Date : 2023-01-01 DOI: 10.1007/s10013-022-00598-9
Nicola De Nitti, E. Zuazua
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引用次数: 0
A Computational Study of Blood Flow Dynamics in the Pulmonary Arteries. 肺动脉血流动力学的计算研究。
IF 0.8 Q2 Mathematics
Vietnam Journal of Mathematics
Pub Date : 2023-01-01 DOI: 10.1007/s10013-022-00595-y
Fabio Marcinno', Alberto Zingaro, Ivan Fumagalli, Luca Dede', Christian Vergara

In this work we study the blood dynamics in the pulmonary arteries by means of a 3D-0D geometric multiscale approach, where a detailed 3D model for the pulmonary arteries is coupled with a lumped parameters (0D) model of the cardiovascular system. We propose to investigate three strategies for the numerical solution of the 3D-0D coupled problem: the Splitting-Explicit and Implicit algorithms, where information are exchanged between 3D and 0D models at each time step at the interfaces, and the One-Way algorithm, where the 0D is solved first off-line. In our numerical experiments performed in a realistic patient-specific 3D domain with a physiologically calibrated 0D model, we discuss first the issue on instabilities that may arise when not suitable connections are considered between 3D and 0D models; second we compare the performance and accuracy of the three proposed numerical strategies. Finally, we report a comparison between a healthy and a hypertensive case, providing a preliminary result highlighting how our method could be used in future for clinical purposes.

在这项工作中，我们通过3D-0D几何多尺度方法研究肺动脉中的血液动力学，其中肺动脉的详细3D模型与心血管系统的集总参数(0D)模型相结合。我们建议研究3D-0D耦合问题数值解的三种策略:分离显式和隐式算法，其中在接口的每个时间步在3D和0D模型之间交换信息，以及单向算法，其中0D首先离线求解。在我们的数值实验中，在一个具有生理校准的0D模型的现实患者特定的3D域中进行，我们首先讨论了当3D和0D模型之间考虑不合适的连接时可能出现的不稳定性问题;其次，我们比较了三种提出的数值策略的性能和精度。最后，我们报告了健康和高血压病例之间的比较，提供了一个初步结果，突出了我们的方法如何在未来用于临床目的。
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引用次数: 6
Strongly Base-Two Groups. 强基两个群。
IF 0.8 Q2 Mathematics
Vietnam Journal of Mathematics
Pub Date : 2023-01-01 Epub Date: 2023-05-10 DOI: 10.1007/s10013-023-00628-0
Timothy C Burness, Robert M Guralnick

Let G be a finite group, let H be a core-free subgroup and let b(G, H) denote the base size for the action of G on G/H. Let α(G) be the number of conjugacy classes of core-free subgroups H of G with b(G,H)≥3. We say that G is a strongly base-two group if α(G)≤1, which means that almost every faithful transitive permutation representation of G has base size 2. In this paper, we study the strongly base-two finite groups with trivial Frattini subgroup.

设G是有限群，设H是无核子群，设b（G，H）表示G对G/H作用的基大小。设α（G）为G的无核子群H与b（G，H）≥3的共轭类的个数。如果α（G）≤1，则G是强基二群，这意味着G的几乎每个忠实传递置换表示都有基大小2。本文研究了具有平凡Frattini子群的强基两个有限群。
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引用次数: 0
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