Polyhedral faces in Gram spectrahedra of binary forms
Polyhedral faces in Gram spectrahedra of binary forms
复制标题
二元形式的革兰谱面体中的多面体
DOI:
10.1016/j.laa.2020.08.025
复制
发表时间:
2021
影响因子:
1.1
通讯作者:
Th. Mayer
中科院分区:
文献类型:
--
作者:
Th. Mayer
The positive semidefinite Gram matrices of a formfwith real coefficients parametrize the sum-of-squares representations off. The convex body formed by the entirety of these matrices is the so-called Gram spectrahedron off. We analyze the facial structures of symmetric and Hermitian Gram spectrahedra in the case of binary forms. We give upper bounds for the dimensions of polyhedral faces in Hermitian Gram spectrahedra and show that, if the formfis sufficiently generic, they can be realized by faces that are simplices and whose extreme points are rank-one tensors. We use our construction to prove a similar statement for the real symmetric case.
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DOI:
10.1090/conm/697/14047
发表时间:
2017
期刊:
arXiv: Algebraic Geometry
影响因子:
--
作者:
Plaumann;Daniel;Rainer;Vinzant;Cynthia
通讯作者:
Cynthia
影响因子:
1.5
作者:
M. Laurent;S. Poljak
通讯作者:
S. Poljak
影响因子:
0.8
作者:
C. Scheiderer
通讯作者:
C. Scheiderer
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
F. Broglia;F. Delon;M. Dickmann;Danielle Gondard;V. Powers
通讯作者:
V. Powers