List questions from positive-semidefinite

Published on 17 Mar 2026 - 16:40

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Show that the symmetric positive semidefinite cone $K = S_+^n$ is a proper cone.

Published on 22 Mar 2026 - 2:35

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How to approximate a 3x3 linear inequality constraint

Published on 24 Mar 2026 - 20:40

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Why is positive semi-definiteness for matrices analgous to positiveness for numbers?

Published on 22 Mar 2026 - 15:39

93

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Recovering a quadratic form from a finite set of values

Published on 24 Mar 2026 - 20:41

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Is $E^T X E \preceq X$ if $X \succ 0$ and $\|E\|_F = 1$?

Published on 22 Mar 2026 - 3:32

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Positive semi-definite Matrix 3

Published on 22 Mar 2026 - 4:35

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Does maximizing the Rayleigh quotient using the method of Lagrange multipliers require the matrix to be positive semidefinite?

Published on 23 Mar 2026 - 5:45

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Closed form solution for block matrix A in $AXA^T=C$

Published on 21 Mar 2026 - 21:57

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can this matrix be positive semidefinite?

Published on 22 Mar 2026 - 15:44

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how to prove positive definite complex matrix

Published on 22 Mar 2026 - 2:18

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Hessian and gradient in a matrix

Published on 22 Mar 2026 - 4:20

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Directional derivatives of matrix trace functionals

Published on 22 Mar 2026 - 16:40

87

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Is $e^{-(L+L^T)}$ a positive definite matrix?

Published on 21 Mar 2026 - 18:37

50

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Is $\pmb{x}<\pmb{y}$ implies $A\pmb{x}<A\pmb{y}$ when $A$ is positive definite?

Published on 21 Mar 2026 - 22:50

List Question

Nearest (with respect to weights) symmetric positive semidefinite matrix

Show that the symmetric positive semidefinite cone $K = S_+^n$ is a proper cone.

How to approximate a 3x3 linear inequality constraint

Why is positive semi-definiteness for matrices analgous to positiveness for numbers?

Recovering a quadratic form from a finite set of values

Is $E^T X E \preceq X$ if $X \succ 0$ and $\|E\|_F = 1$?

Positive semi-definite Matrix 3

Does maximizing the Rayleigh quotient using the method of Lagrange multipliers require the matrix to be positive semidefinite?

Closed form solution for block matrix A in $AXA^T=C$

can this matrix be positive semidefinite?

how to prove positive definite complex matrix

Hessian and gradient in a matrix

Directional derivatives of matrix trace functionals

Is $e^{-(L+L^T)}$ a positive definite matrix?

Is $\pmb{x}<\pmb{y}$ implies $A\pmb{x}<A\pmb{y}$ when $A$ is positive definite?

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