Question

$f(A)=0 \iff A$ is not invertible

score 216 · Answer 1 · 2019-11-18 21:32:35

216

Views

$f(A)=0 \iff A$ is not invertible

Published on 18 Nov 2019 - 21:32

score 120 · Answer 2 · 2019-11-20 13:39:29

120

Views

Prove that a $(n+1)\times(n+1)$ matrix with cosinuses is invertible

Published on 20 Nov 2019 - 13:39

score 49 · Answer 3 · 2026-03-26 06:17:23

49

Views

arithmetic function invertible concerning convolution?

Published on 26 Mar 2026 - 6:17

score 47 · Answer 4 · 2019-11-20 23:32:30

47

Views

How to calculate $A^{-1}$, $A^{-7}$ efficiently

Published on 20 Nov 2019 - 23:32

score 52 · Answer 5 · 2026-03-26 12:50:42

52

Views

Find identity and inverses of the group $(\Bbb{Z}_6,+)\times(\Bbb{Z}_5,\cdot)$.

Published on 26 Mar 2026 - 12:50

score 85 · Answer 6 · 2019-11-21 08:31:44

85

Views

Proving a statement about invertible square matrices

Published on 21 Nov 2019 - 8:31

score 31 · Answer 7 · 2019-11-21 13:36:10

31

Views

how to prove that $BB^H$ must be invertible.If $\mathbf B$ is a $N$ by $M$ matrix,and $N<M$

Published on 21 Nov 2019 - 13:36

score 124 · Answer 8 · 2019-11-21 16:47:02

124

Views

Inverse of sum of two matrix when one is PSD and the other is diagnal?

Published on 21 Nov 2019 - 16:47

score 35 · Answer 9 · 2026-03-28 03:33:16

35

Views

Is a map $f\colon\mathbb{R}^{2}\to\mathbb{R}^{2}$ invertible iff its induced map on the torus $F\colon[0,1]^{2}/\sim\to[0,1]^{2}/\sim$ is invertible?

Published on 28 Mar 2026 - 3:33

score 71 · Answer 10 · 2019-11-23 16:42:43

71

Views

By knowing $1 = 1^{-1} \mod p$ for a prime $p$, why can we obtain multiplicative inverse of $i$ for i = 2,...,p-1?

Published on 23 Nov 2019 - 16:42

score 2.9k · Answer 11 · 2019-11-23 20:26:43

2.9k

Views

Calculating Modular Multiplicative Inverse for negative values of a.

Published on 23 Nov 2019 - 20:26

score 1.3k · Answer 12 · 2026-03-28 06:09:09

1.3k

Views

Derivative of inverse function using $dx/dy$ - what is going on here?

Published on 28 Mar 2026 - 6:09

score 133 · Answer 13 · 2019-11-25 11:21:14

133

Views

Inverse of a special symmetric matrix

Published on 25 Nov 2019 - 11:21

score 1.8k · Answer 14 · 2019-11-25 17:13:41

1.8k

Views

Inverse function derivative of multivariable functions

Published on 25 Nov 2019 - 17:13

score 111 · Answer 15 · 2019-11-26 08:27:35

111

Views

Sum of inverse functions equal to the inverse of the sum of functions

Published on 26 Nov 2019 - 8:27

List Question

$f(A)=0 \iff A$ is not invertible

Prove that a $(n+1)\times(n+1)$ matrix with cosinuses is invertible

arithmetic function invertible concerning convolution?

How to calculate $A^{-1}$, $A^{-7}$ efficiently

Find identity and inverses of the group $(\Bbb{Z}_6,+)\times(\Bbb{Z}_5,\cdot)$.

Proving a statement about invertible square matrices

how to prove that $BB^H$ must be invertible.If $\mathbf B$ is a $N$ by $M$ matrix,and $N<M$

Inverse of sum of two matrix when one is PSD and the other is diagnal?

Is a map $f\colon\mathbb{R}^{2}\to\mathbb{R}^{2}$ invertible iff its induced map on the torus $F\colon[0,1]^{2}/\sim\to[0,1]^{2}/\sim$ is invertible?

By knowing $1 = 1^{-1} \mod p$ for a prime $p$, why can we obtain multiplicative inverse of $i$ for i = 2,...,p-1?

Calculating Modular Multiplicative Inverse for negative values of a.

Derivative of inverse function using $dx/dy$ - what is going on here?

Inverse of a special symmetric matrix

Inverse function derivative of multivariable functions

Sum of inverse functions equal to the inverse of the sum of functions

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