Symplectically convex and symplectically star-shaped curves: a variational problem
Symplectically convex and symplectically star-shaped curves: a variational problem
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辛凸曲线和辛星形曲线:变分问题
DOI:
10.1007/s11784-022-00931-2
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发表时间:
2022
影响因子:
1.8
通讯作者:
Tabachnikov, Serge
中科院分区:
文献类型:
--
作者:
Albers, Peter;Tabachnikov, Serge
In this article, we propose a generalization of the 2-dimensional notions of convexity resp. being star-shaped to symplectic vector spaces. We call such curves symplectically convex resp. symplectically star-shaped. After presenting some basic results, we study a family of variational problems for symplectically convex and symplectically star-shaped curves which is motivated by the affine isoperimetric inequality. These variational problems can be reduced back to two dimensions. For a range of the family parameter, extremal points of the variational problem are rigid: they are multiply traversed conics. For all family parameters, we determine when non-trivial first- and second-order deformations of conics exist. In the last section, we present some conjectures and questions and two galleries created with the help of a Mathematica applet by Gil Bor.
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DOI:
10.1090/cams/9
发表时间:
2022
期刊:
Communications of the American Mathematical Society
影响因子:
--
作者:
Bialy, Misha;Bor, Gil;Tabachnikov, Serge
通讯作者:
Tabachnikov, Serge
DOI:
10.5860/choice.28-6244
发表时间:
1990
期刊:
Communications of the American Mathematical Society
影响因子:
--
作者:
V. Arnold
通讯作者:
V. Arnold
DOI:
10.1007/bf01587937
发表时间:
1995
期刊:
Selecta Mathematica
影响因子:
--
作者:
V. Ovsienko;S. Tabachnikov
通讯作者:
S. Tabachnikov
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
Ikehata;M and Ohe;T;松本久義
通讯作者:
松本久義
影响因子:
0.6
作者:
Kohtaro Watanabe
通讯作者:
Kohtaro Watanabe