List questions from projection-matrices

Published on 26 Mar 2026 - 4:32

45

Views

Reading off probabilities for measurement outcome rather than using projection operator?

Published on 26 Aug 2023 - 9:38

116

Views

Lower bound on smallest principal angle between two complementary subspaces

Published on 04 Sep 2023 - 12:27

42

Views

Rank of a matrix multiplied by random projections

Published on 06 Oct 2023 - 19:56

215

Views

How to determine if the orthogonal projection is onto a line or a plane?

Published on 09 Oct 2023 - 20:15

51

Views

von Neumann entropy in a reduced state space

Published on 17 Oct 2023 - 11:32

146

Views

Eigenvalue relation of a symmetric matrix $A$ and $A + vv^T$

Published on 26 Mar 2026 - 11:15

13

Views

Does Matrix projection impacts centralization

Published on 23 Mar 2026 - 20:29

23

Views

Custom block-wise matrix

Published on 27 Nov 2023 - 9:04

120

Views

$\text{rank}(A)+\text{rank}(A-I)=n \iff A^2=A$. I don't know my mistake in my proof

Published on 26 Mar 2026 - 13:52

67

Views

Vector having same absolute correlation with all columns

Published on 18 Dec 2023 - 12:00

28

Views

Reducing the size of the product of a matrix and a vector

Published on 11 Jan 2024 - 14:35

118

Views

Given a $n \times n$ matrix $A$, when do the first $p$ columns of $A^{-1}$ coincide with the Moore–Penrose inverse of the first $p$ rows of $A$?

Published on 26 Mar 2026 - 21:10

51

Views

What causes a trace of a product of two projection operators to not be a whole number

Published on 20 Jan 2024 - 18:10

105

Views

Properties of a Product of Commuting Projections

Published on 26 Mar 2026 - 7:59

List Question

inner product (Bra - Ket) involving projection operator

Reading off probabilities for measurement outcome rather than using projection operator?

Lower bound on smallest principal angle between two complementary subspaces

Rank of a matrix multiplied by random projections

How to determine if the orthogonal projection is onto a line or a plane?

von Neumann entropy in a reduced state space

Eigenvalue relation of a symmetric matrix $A$ and $A + vv^T$

Does Matrix projection impacts centralization

Custom block-wise matrix

$\text{rank}(A)+\text{rank}(A-I)=n \iff A^2=A$. I don't know my mistake in my proof

Vector having same absolute correlation with all columns

Reducing the size of the product of a matrix and a vector

Given a $n \times n$ matrix $A$, when do the first $p$ columns of $A^{-1}$ coincide with the Moore–Penrose inverse of the first $p$ rows of $A$?

What causes a trace of a product of two projection operators to not be a whole number

Properties of a Product of Commuting Projections

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