Question

Optimization problem about large matrices

score 193 · Answer 1 · 2026-04-08 22:01:00

193

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Optimization problem about large matrices

Published on 08 Apr 2026 - 22:01

score 1.8k · Answer 2 · 2026-04-15 17:14:59

1.8k

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Invertible functions in $ R^m$

Published on 15 Apr 2026 - 17:14

score 3.8k · Answer 3 · 2026-04-14 04:32:30

3.8k

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Proof: if the graphs of $y=f(x)$ and $y=f^{-1}(x)$ intersect, they do so on the line $y=x$

Published on 14 Apr 2026 - 4:32

score 16.5k · Answer 4 · 2026-04-14 09:50:14

16.5k

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Help finding inverse of $f(x)=\frac{e^x-e^{-x}}{2}$

Published on 14 Apr 2026 - 9:50

score 350.3k · Answer 5 · 2026-04-14 08:57:21

350.3k

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Transpose of inverse vs inverse of transpose

Published on 14 Apr 2026 - 8:57

score 91 · Answer 6 · 2026-04-09 22:40:24

91

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About non-negative matrix

Published on 09 Apr 2026 - 22:40

score 126 · Answer 7 · 2026-04-13 10:11:27

126

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How to find the inverse of a function $f:\mathbb{Z}_{30}\to\mathbb{Z}_{30}$ defined by $f([a])=[7a]$

Published on 13 Apr 2026 - 10:11

score 190 · Answer 8 · 2026-04-14 00:04:02

190

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Sum of diagonal blocks of inverse of block matrix

Published on 14 Apr 2026 - 0:04

score 219 · Answer 9 · 2026-03-26 04:34:01

219

Views

How to update/recalculate the inverse of matrix after changed one element's value?

Published on 26 Mar 2026 - 4:34

score 159 · Answer 10 · 2026-04-16 22:36:22

159

Views

Condition of positive definiteness based upon diagonal elements of the original and inverse matrices

Published on 16 Apr 2026 - 22:36

score 71 · Answer 11 · 2026-04-12 22:28:11

71

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Inverse of a matrix — when is it defined?

Published on 12 Apr 2026 - 22:28

score 259 · Answer 12 · 2026-04-17 12:43:26

259

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Why does definition of the inverse of a matrix involves having $AB=I=BA$?

Published on 17 Apr 2026 - 12:43

score 90 · Answer 13 · 2026-03-26 17:32:50

90

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If $\phi$ is a homeomorphism and both $\phi$ and $\phi^{-1}$ extend to differentiable functions, is ${\rm D}\phi(x)$ invertible?

Published on 26 Mar 2026 - 17:32

score 5.1k · Answer 14 · 2026-04-15 00:16:16

5.1k

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Matrix multiplied by its pseudo-inverse doesn't give the identity matrix. Why?

Published on 15 Apr 2026 - 0:16

score 39 · Answer 15 · 2026-04-11 07:22:17

39

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Invertibility of a square matrix

Published on 11 Apr 2026 - 7:22

List Question

Optimization problem about large matrices

Invertible functions in $ R^m$

Proof: if the graphs of $y=f(x)$ and $y=f^{-1}(x)$ intersect, they do so on the line $y=x$

Help finding inverse of $f(x)=\frac{e^x-e^{-x}}{2}$

Transpose of inverse vs inverse of transpose

About non-negative matrix

How to find the inverse of a function $f:\mathbb{Z}_{30}\to\mathbb{Z}_{30}$ defined by $f([a])=[7a]$

Sum of diagonal blocks of inverse of block matrix

How to update/recalculate the inverse of matrix after changed one element's value?

Condition of positive definiteness based upon diagonal elements of the original and inverse matrices

Inverse of a matrix — when is it defined?

Why does definition of the inverse of a matrix involves having $AB=I=BA$?

If $\phi$ is a homeomorphism and both $\phi$ and $\phi^{-1}$ extend to differentiable functions, is ${\rm D}\phi(x)$ invertible?

Matrix multiplied by its pseudo-inverse doesn't give the identity matrix. Why?

Invertibility of a square matrix

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