List questions from inverse

Published on 14 Apr 2026 - 0:28

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If T is invertible, prove it is isomorphic

Published on 13 Apr 2026 - 14:34

41

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Proving $X= f^{-1}[f[X]]$

Published on 24 Nov 2017 - 17:33

584

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Inverse of a self-adjoint operator

Published on 10 Apr 2026 - 11:28

255

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Gaussian elimination for rings with zero divisors

Published on 12 Apr 2026 - 0:05

61

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$3\times3$ matrix inversion proof

Published on 14 Apr 2026 - 4:18

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If A is not invertible, can it still be diagonalizable?

Published on 13 Apr 2026 - 14:31

785

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Are there any rings where $0$ has a multiplicative inverse?

Published on 14 Apr 2026 - 5:18

44

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A question from inverse trigonometry.

Published on 11 Apr 2026 - 8:31

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If $A$ and $B$ are $n×n$ matrices, $AB = -BA$ , and $n$ is odd, show that either $A$ or $B$ has no inverse.

Published on 30 Nov 2017 - 1:11

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If $ A=\begin{bmatrix} 1 & a & b\\ -a & -1 & c \\ -b & -c & 1 \end{bmatrix}$, show that $detA=1+a^2+b^2+c^2$. Hence, find $A^{-1}$ for any a,b, and c.

Published on 30 Nov 2017 - 2:54

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Is infinite upper triangular matrix with nonzero entries on the diagonal invertible?

Published on 25 Mar 2026 - 12:55

124

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Prove that each matrix is invertible and find their inverses

Published on 30 Nov 2017 - 20:10

46

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Find the inverse of this matrix using the property of PSD?

Published on 13 Apr 2026 - 18:19

97

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matrix inversion with low-rank trace update

Published on 11 Apr 2026 - 6:44

List Question

Inverse Trigonometry System of Equations

If T is invertible, prove it is isomorphic

Proving $X= f^{-1}[f[X]]$

Inverse of a self-adjoint operator

Gaussian elimination for rings with zero divisors

$3\times3$ matrix inversion proof

If A is not invertible, can it still be diagonalizable?

Are there any rings where $0$ has a multiplicative inverse?

A question from inverse trigonometry.

If $A$ and $B$ are $n×n$ matrices, $AB = -BA$ , and $n$ is odd, show that either $A$ or $B$ has no inverse.

If $ A=\begin{bmatrix} 1 & a & b\\ -a & -1 & c \\ -b & -c & 1 \end{bmatrix}$, show that $detA=1+a^2+b^2+c^2$. Hence, find $A^{-1}$ for any a,b, and c.

Is infinite upper triangular matrix with nonzero entries on the diagonal invertible?

Prove that each matrix is invertible and find their inverses

Find the inverse of this matrix using the property of PSD?

matrix inversion with low-rank trace update

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