Timeline for Solution of a quadratic matrix equation with singular coefficent

9 events

when toggle format	what		by	license	comment
S Dec 7, 2017 at 20:50	history	suggested	Rodrigo de Azevedo	CC BY-SA 3.0	Minor improvements
Dec 7, 2017 at 20:17	comment	added	Robert Israel		In that case your equation can't have positive semidefinite solutions, except in the trivial case $a=0$: $a^T(C S C + C + A) a \ge \\|a\\|^4 > 0$.
Dec 7, 2017 at 20:14	comment	added	Umer Abdullah		Yes. Apologies for the lack of clarity. $\mathbf{S}$ is symmetric, it is also the product of a column vector with its transpose $\mathbf{S}=s∗s^{T}$
Dec 7, 2017 at 19:50	comment	added	Rodrigo de Azevedo		is $S$ symmetric?
Dec 7, 2017 at 19:44	review	Suggested edits
S Dec 7, 2017 at 20:50
Dec 7, 2017 at 19:17	history	edited	Umer Abdullah	CC BY-SA 3.0	edited body
Dec 7, 2017 at 18:36	history	edited	Umer Abdullah	CC BY-SA 3.0	added 310 characters in body
Dec 7, 2017 at 18:21	review	First posts
Dec 7, 2017 at 18:31
Dec 7, 2017 at 18:17	history	asked	Umer Abdullah	CC BY-SA 3.0