Question

Rank of projection matrix $P$

score 4.3k · Answer 1 · 2026-05-10 14:55:50

4.3k

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Rank of projection matrix $P$

Published on 10 May 2026 - 14:55

score 815 · Answer 2 · 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 77 · Answer 3 · 2026-04-17 03:16:48

77

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If $A$ is $k\times l$ and $B$ is $l\times k$, $l\geq k$ and full-rank, must $AB$ have full-rank?

Published on 17 Apr 2026 - 3:16

score 41 · Answer 4 · 2026-04-16 14:32:49

41

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To find the rank of a matrix:

Published on 16 Apr 2026 - 14:32

score 53 · Answer 5 · 2026-04-10 11:20:25

53

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Steep of the proof of embedding $\mathbb{RP}^{2}$ into $\mathbb{R}^{4}$

Published on 10 Apr 2026 - 11:20

score 105 · Answer 6 · 2026-05-10 17:00:16

105

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A confusion related to the rank of the matrix

Published on 10 May 2026 - 17:00

score 88 · Answer 7 · 2026-04-12 22:05:36

88

Views

How to get the linear combination of the rows that result in Identity matrix?

Published on 12 Apr 2026 - 22:05

score 225 · Answer 8 · 2026-04-15 16:48:26

225

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rank and determinant of system of quadratic equations

Published on 15 Apr 2026 - 16:48

score 123 · Answer 9 · 2026-04-12 19:41:47

123

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When to break a matrix into low rank and diagonal component?

Published on 12 Apr 2026 - 19:41

score 306 · Answer 10 · 2026-04-12 16:16:53

306

Views

Why does this non-linear function make the matrix rank arbitrarily large?

Published on 12 Apr 2026 - 16:16

score 608 · Answer 11 · 2026-05-10 16:12:55

608

Views

Obtain (or close to) Identity matrix by multiplying two vectors such as: $D * (C)^H = I$

Published on 10 May 2026 - 16:12

score 1.4k · Answer 12 · 2026-04-14 06:19:29

1.4k

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eigenvalues of "diagonal matrix $+$ rank one matrix"

Published on 14 Apr 2026 - 6:19

score 4k · Answer 13 · 2026-04-12 01:42:14

4k

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Proof any five points determine a conic

Published on 12 Apr 2026 - 1:42

score 37 · Answer 14 · 2026-04-14 06:52:14

37

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Condition for rank to be 2.

Published on 14 Apr 2026 - 6:52

score 506 · Answer 15 · 2026-04-16 03:19:10

506

Views

How to show that matrix over $\mathbb{F}_2^{m \times n}$ is full rank $\iff$ it has square invertible submatrix $\in \mathbb{F}_2^{m \times m}$?

Published on 16 Apr 2026 - 3:19

List Question

Rank of projection matrix $P$

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

If $A$ is $k\times l$ and $B$ is $l\times k$, $l\geq k$ and full-rank, must $AB$ have full-rank?

To find the rank of a matrix:

Steep of the proof of embedding $\mathbb{RP}^{2}$ into $\mathbb{R}^{4}$

A confusion related to the rank of the matrix

How to get the linear combination of the rows that result in Identity matrix?

rank and determinant of system of quadratic equations

When to break a matrix into low rank and diagonal component?

Why does this non-linear function make the matrix rank arbitrarily large?

Obtain (or close to) Identity matrix by multiplying two vectors such as: $D * (C)^H = I$

eigenvalues of "diagonal matrix $+$ rank one matrix"

Proof any five points determine a conic

Condition for rank to be 2.

How to show that matrix over $\mathbb{F}_2^{m \times n}$ is full rank $\iff$ it has square invertible submatrix $\in \mathbb{F}_2^{m \times m}$?

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