Question

How to find the dimension of $A$?

score 70 · Answer 1 · 2026-04-12 08:22:21

70

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How to find the dimension of $A$?

Published on 12 Apr 2026 - 8:22

score 947 · Answer 2 · 2026-04-09 04:27:43

947

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Meaning of $c$ in the linear equation $ax + by = c$

Published on 09 Apr 2026 - 4:27

score 317 · Answer 3 · 2026-04-09 00:13:01

317

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Does $\det(A-BC) = \det (A)$?

Published on 09 Apr 2026 - 0:13

score 815 · Answer 4 · 2026-04-17 01:05:34

815

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$A=\frac{xx^T}{x^Tx}$.Find the dimension of the vector space $[y \in \mathbb{R^3}:Ay=0]$

Published on 17 Apr 2026 - 1:05

score 425 · Answer 5 · 2026-04-15 07:44:30

425

Views

Prove $\langle u,v \rangle = uAv^* $ defines an inner product.

Published on 15 Apr 2026 - 7:44

score 66 · Answer 6 · 2026-04-16 19:33:30

If $M=\left(\begin{smallmatrix} 0 & 1 & -1 \\ -1 & 0 & \alpha \\ 2 & -\alpha & 0 \end{smallmatrix}\right)$ and $Mx=b$, for some $x$,then find $x^TMx$

score 38 · Answer 7 · 2026-04-15 12:04:46

38

Views

Scaling a map so that when printed, 1cm measured is 25000cm real life

Published on 15 Apr 2026 - 12:04

score 141 · Answer 8 · 2026-04-14 17:37:17

141

Views

Diagonal matrix property proof

Published on 14 Apr 2026 - 17:37

score 1.5k · Answer 9 · 2026-04-16 12:16:51

1.5k

Views

Inverse of doubly stochastic matrix $M$ is doubly stochastic iff $M$ is a permution matrix

Published on 16 Apr 2026 - 12:16

score 86 · Answer 10 · 2026-04-10 08:47:13

86

Views

Proving $My=c$ has a solution iff $c^Tv=0$ whenever $M^Tv=0$

Published on 10 Apr 2026 - 8:47

score 98 · Answer 11 · 2026-04-11 10:43:27

98

Views

Existence of extension of lin. indep. set to a basis

Published on 11 Apr 2026 - 10:43

score 87 · Answer 12 · 2026-04-15 00:30:08

87

Views

Why is $|\mathbf{a}|^{2T}\mathbf{b}=\mathbf{a}^{T}diag(\mathbf{b})\mathbf{a}$ true?

Published on 15 Apr 2026 - 0:30

score 96 · Answer 13 · 2026-04-29 12:43:00

96

Views

Injective Linear Transformation $K[x]_{\leq 4}\rightarrow V$

Published on 29 Apr 2026 - 12:43

score 36 · Answer 14 · 2026-04-17 01:49:05

36

Views

Why does a $n$-dimensional convex polytope require at least $n+1$ vertices?

Published on 17 Apr 2026 - 1:49

score 688 · Answer 15 · 2026-04-13 00:30:06

Find the matrix of the linear transformation on R 2 given by orthogonal projection onto line L containing the origin, angle theta with x-axis

List Question

How to find the dimension of $A$?

Meaning of $c$ in the linear equation $ax + by = c$

Does $\det(A-BC) = \det (A)$?

$A=\frac{xx^T}{x^Tx}$.Find the dimension of the vector space $[y \in \mathbb{R^3}:Ay=0]$

Prove $\langle u,v \rangle = uAv^* $ defines an inner product.

If $M=\left(\begin{smallmatrix} 0 & 1 & -1 \\ -1 & 0 & \alpha \\ 2 & -\alpha & 0 \end{smallmatrix}\right)$ and $Mx=b$, for some $x$,then find $x^TMx$

Scaling a map so that when printed, 1cm measured is 25000cm real life

Diagonal matrix property proof

Inverse of doubly stochastic matrix $M$ is doubly stochastic iff $M$ is a permution matrix

Proving $My=c$ has a solution iff $c^Tv=0$ whenever $M^Tv=0$

Existence of extension of lin. indep. set to a basis

Why is $|\mathbf{a}|^{2T}\mathbf{b}=\mathbf{a}^{T}diag(\mathbf{b})\mathbf{a}$ true?

Injective Linear Transformation $K[x]_{\leq 4}\rightarrow V$

Why does a $n$-dimensional convex polytope require at least $n+1$ vertices?

Find the matrix of the linear transformation on R 2 given by orthogonal projection onto line L containing the origin, angle theta with x-axis

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