Question

Proving bijectivity by finding "the inverse".

score 177 · Answer 1 · 2026-04-13 16:04:45

177

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Proving bijectivity by finding "the inverse".

Published on 13 Apr 2026 - 16:04

score 235 · Answer 2 · 2026-05-03 10:55:59

235

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inverse of lower triangular matrix with factorials

Published on 03 May 2026 - 10:55

score 771 · Answer 3 · 2026-05-02 18:20:15

771

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Why is the inverse of the derivative of f not the actual derivative of the inverse of f?

Published on 02 May 2026 - 18:20

score 217 · Answer 4 · 2026-04-14 22:47:07

217

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Inverse of a particular matrix: $A = D + aJ$, all entries of $J$ are equal to $1$

Published on 14 Apr 2026 - 22:47

score 305 · Answer 5 · 2026-04-29 12:27:18

305

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Inverse of an Infinite Matrix (with factorials)

Published on 29 Apr 2026 - 12:27

score 939 · Answer 6 · 2026-05-04 21:51:54

939

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inverting a matrix using the LU decomposition approach

Published on 04 May 2026 - 21:51

score 6.4k · Answer 7 · 2026-04-17 10:46:53

6.4k

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Why is that if every row of a matrix sums to 1, then the rows of the inverse matrix sums to 1 too?

Published on 17 Apr 2026 - 10:46

score 83 · Answer 8 · 2026-05-02 23:46:21

83

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How can I express a resulting discrepancy? (Proving $\varphi(x \in G) = x^{-1}$ is an automorphism iff G is abelian)

Published on 02 May 2026 - 23:46

score 1.7k · Answer 9 · 2026-03-24 23:49:53

1.7k

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Let $A,B$ be $m \times n$ and $n \times m$ matrices, respectively. Prove that if $m > n$, $AB$ is not invertible

Published on 24 Mar 2026 - 23:49

score 59 · Answer 10 · 2026-04-15 20:26:14

59

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finding a bijective map from $ F(m,n)\times F(k,n)$ to $F(m+k,n)$

Published on 15 Apr 2026 - 20:26

score 150 · Answer 11 · 2026-05-10 11:57:45

150

Views

Complex projective line 1

Published on 10 May 2026 - 11:57

score 52 · Answer 12 · 2026-04-16 18:22:18

52

Views

write the inverse of: $y= 3(4)^{2x+1} + 1$

Published on 16 Apr 2026 - 18:22

score 92 · Answer 13 · 2026-04-12 14:05:28

92

Views

Under what circumstances can we take this inverse matrix?

Published on 12 Apr 2026 - 14:05

score 82 · Answer 14 · 2026-04-14 00:06:40

82

Views

Does anyone know how to calculate the inverse matrix of $I+\mu\mu^{\top}$?

Published on 14 Apr 2026 - 0:06

score 438 · Answer 15 · 2026-05-10 08:49:25

438

Views

Newton method for function $f :\mathbb R^n \to\mathbb R$

Published on 10 May 2026 - 8:49

List Question

Proving bijectivity by finding "the inverse".

inverse of lower triangular matrix with factorials

Why is the inverse of the derivative of f not the actual derivative of the inverse of f?

Inverse of a particular matrix: $A = D + aJ$, all entries of $J$ are equal to $1$

Inverse of an Infinite Matrix (with factorials)

inverting a matrix using the LU decomposition approach

Why is that if every row of a matrix sums to 1, then the rows of the inverse matrix sums to 1 too?

How can I express a resulting discrepancy? (Proving $\varphi(x \in G) = x^{-1}$ is an automorphism iff G is abelian)

Let $A,B$ be $m \times n$ and $n \times m$ matrices, respectively. Prove that if $m > n$, $AB$ is not invertible

finding a bijective map from $ F(m,n)\times F(k,n)$ to $F(m+k,n)$

Complex projective line 1

write the inverse of: $y= 3(4)^{2x+1} + 1$

Under what circumstances can we take this inverse matrix?

Does anyone know how to calculate the inverse matrix of $I+\mu\mu^{\top}$?

Newton method for function $f :\mathbb R^n \to\mathbb R$

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