Question

SVD of matrix plus diagonal matrix and inversed

score 1k · Answer 1 · 2026-03-17 20:31:00

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SVD of matrix plus diagonal matrix and inversed

Published on 17 Mar 2026 - 20:31

score 1k · Answer 2 · 2018-02-09 22:45:20

1k

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Prove that there exist invertible operators R and S such that $T_1=ST_2R$ iff dim null $T_1$ = dim null $T_2$

Published on 09 Feb 2018 - 22:45

score 122 · Answer 3 · 2026-03-22 17:52:21

122

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Divide a matrix - How to do that in MATLAB?

Published on 22 Mar 2026 - 17:52

score 89 · Answer 4 · 2026-03-24 22:08:48

89

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Set of values of $a$ satisfying an inverse trigonometric equation.

Published on 24 Mar 2026 - 22:08

score 4.3k · Answer 5 · 2026-03-20 05:10:35

4.3k

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Show non-singularity of orthogonal matrix

Published on 20 Mar 2026 - 5:10

score 86 · Answer 6 · 2018-02-11 21:24:54

86

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Show that $A$ is invertible. Let $A$ be an $n \times n$ matrix that satisfies $A^3 +a_{2}A^2 +a_{1}A+I_{n} =0$

Published on 11 Feb 2018 - 21:24

score 907 · Answer 7 · 2018-02-11 22:13:01

907

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A is a nxn matrix with zero as an eigenvalue. Show that $A$ is not invertible.

Published on 11 Feb 2018 - 22:13

score 56 · Answer 8 · 2018-02-12 19:34:34

56

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Find $A^{-1}$ if $AB^TC = I_n$, where $A$, $B$, and $C$ are invertible $n \times n$ matrices

Published on 12 Feb 2018 - 19:34

score 46 · Answer 9 · 2026-03-17 16:00:45

46

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Is "(a * a') is cancellative" + "M has an identity" the same as "a has an inverse"

Published on 17 Mar 2026 - 16:00

score 1k · Answer 10 · 2026-03-22 17:26:38

1k

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Polynomial ring over finite field - inverting a polynomial non-prime

Published on 22 Mar 2026 - 17:26

score 2.2k · Answer 11 · 2026-03-18 15:53:03

2.2k

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What does a matrix multiplied by its transpose tell me about the matrix's inverse?

Published on 18 Mar 2026 - 15:53

score 63 · Answer 12 · 2018-02-16 00:25:21

63

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Let $A, B : V \to V$ be linear transformations, where V is a vector space. Prove that $I - ST$ is invertible iff $I - TS$ is invertible.

Published on 16 Feb 2018 - 0:25

score 82 · Answer 13 · 2018-02-16 01:09:40

82

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Prove that if $A\colon V \to V$ is a linear transformation, where $V$ is a finite-dimensional vector space, has a right inverse, then its invertible

Published on 16 Feb 2018 - 1:09

score 3.2k · Answer 14 · 2018-02-18 00:52:55

3.2k

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How to prove that $AB$ is invertible if and only if $A$ is invertible?

Published on 18 Feb 2018 - 0:52

score 263 · Answer 15 · 2026-03-23 02:28:45

263

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Solve $Ax=b$ for $A$

Published on 23 Mar 2026 - 2:28

List Question

SVD of matrix plus diagonal matrix and inversed

Prove that there exist invertible operators R and S such that $T_1=ST_2R$ iff dim null $T_1$ = dim null $T_2$

Divide a matrix - How to do that in MATLAB?

Set of values of $a$ satisfying an inverse trigonometric equation.

Show non-singularity of orthogonal matrix

Show that $A$ is invertible. Let $A$ be an $n \times n$ matrix that satisfies $A^3 +a_{2}A^2 +a_{1}A+I_{n} =0$

A is a nxn matrix with zero as an eigenvalue. Show that $A$ is not invertible.

Find $A^{-1}$ if $AB^TC = I_n$, where $A$, $B$, and $C$ are invertible $n \times n$ matrices

Is "(a * a') is cancellative" + "M has an identity" the same as "a has an inverse"

Polynomial ring over finite field - inverting a polynomial non-prime

What does a matrix multiplied by its transpose tell me about the matrix's inverse?

Let $A, B : V \to V$ be linear transformations, where V is a vector space. Prove that $I - ST$ is invertible iff $I - TS$ is invertible.

Prove that if $A\colon V \to V$ is a linear transformation, where $V$ is a finite-dimensional vector space, has a right inverse, then its invertible

How to prove that $AB$ is invertible if and only if $A$ is invertible?

Solve $Ax=b$ for $A$

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