Question

How can I solve $Ax=y$ for nonsquare matrix $A$.

score 646 · Answer 1 · 2026-04-08 18:20:00

646

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How can I solve $Ax=y$ for nonsquare matrix $A$.

Published on 08 Apr 2026 - 18:20

score 134 · Answer 2 · 2026-03-25 11:06:31

134

Views

Showing a group is abelian of order $\det(M)$

Published on 25 Mar 2026 - 11:06

score 4.9k · Answer 3 · 2026-03-25 17:36:48

4.9k

Views

Finding an invertible matrix P and some matrix C

Published on 25 Mar 2026 - 17:36

score 164 · Answer 4 · 2018-04-16 19:39:47

164

Views

Fully indecomposable matrices are primitive

Published on 16 Apr 2018 - 19:39

score 115 · Answer 5 · 2026-03-25 12:53:15

115

Views

For rotation matrix $A$, find $B = A^4- A^3 + A^2 - A$

Published on 25 Mar 2026 - 12:53

score 198 · Answer 6 · 2026-03-28 22:28:28

198

Views

A is $n\times n$ diagonalizable matrix and that A has only 2, ad 4 as its eigenvalues. Show that $A^2=6A-8I$

Published on 28 Mar 2026 - 22:28

score 178 · Answer 7 · 2026-03-25 01:16:20

178

Views

Discrete subgroups of $SL(2,\mathbb{C})$ characterization in terms of the norm using "diagonal process".

Published on 25 Mar 2026 - 1:16

score 36 · Answer 8 · 2018-04-16 20:50:37

36

Views

If a sequence of distinct vectors is such that the sequence of norms converges, then, is the sequence convergent?

Published on 16 Apr 2018 - 20:50

score 173 · Answer 9 · 2018-04-16 23:23:12

173

Views

For any $n\times n$ matrix $A$, there corresponds a vector $x\neq 0$ such that $\|Ax\|=\|A\|\|x\|$

Published on 16 Apr 2018 - 23:23

score 117 · Answer 10 · 2026-03-25 23:13:07

117

Views

What is this problem asking for? "Prove that the residue of $A$ in $R/P$ has rank $1$ for every prime ideal $P$ of $R$"

Published on 25 Mar 2026 - 23:13

score 37 · Answer 11 · 2026-03-25 07:31:55

37

Views

Gradient of a partial differential matrix

Published on 25 Mar 2026 - 7:31

score 391 · Answer 12 · 2026-03-31 21:34:34

391

Views

Simpler proof that $\det A\neq 0$ if $A$ is invertible?

Published on 31 Mar 2026 - 21:34

score 659 · Answer 13 · 2026-03-24 23:44:40

659

Views

Functions for which the Jacobian has orthogonal columns or rows

Published on 24 Mar 2026 - 23:44

score 50 · Answer 14 · 2026-03-25 23:38:14

50

Views

Confusion of a Claim in Talagrand's Paper

Published on 25 Mar 2026 - 23:38

score 238 · Answer 15 · 2026-03-25 12:49:41

238

Views

How do I prove that equation of pair of tangents to a conic is $T^2=SS_0$?

Published on 25 Mar 2026 - 12:49

List Question

How can I solve $Ax=y$ for nonsquare matrix $A$.

Showing a group is abelian of order $\det(M)$

Finding an invertible matrix P and some matrix C

Fully indecomposable matrices are primitive

For rotation matrix $A$, find $B = A^4- A^3 + A^2 - A$

A is $n\times n$ diagonalizable matrix and that A has only 2, ad 4 as its eigenvalues. Show that $A^2=6A-8I$

Discrete subgroups of $SL(2,\mathbb{C})$ characterization in terms of the norm using "diagonal process".

If a sequence of distinct vectors is such that the sequence of norms converges, then, is the sequence convergent?

For any $n\times n$ matrix $A$, there corresponds a vector $x\neq 0$ such that $\|Ax\|=\|A\|\|x\|$

What is this problem asking for? "Prove that the residue of $A$ in $R/P$ has rank $1$ for every prime ideal $P$ of $R$"

Gradient of a partial differential matrix

Simpler proof that $\det A\neq 0$ if $A$ is invertible?

Functions for which the Jacobian has orthogonal columns or rows

Confusion of a Claim in Talagrand's Paper

How do I prove that equation of pair of tangents to a conic is $T^2=SS_0$?

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