List questions from matrix-decomposition

Published on 25 Mar 2026 - 18:07

425

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Decomposing PSD block matrix into two PSD block matrices

Published on 28 Mar 2026 - 14:53

2.9k

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Uniqueness of the Jordan decomposition

Published on 02 Apr 2026 - 3:39

55

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Getting rid of not invertible matrices

Published on 03 Aug 2020 - 22:39

431

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There is a unique QR factorization of any matrix $A$ that has full column rank — true or false?

Published on 04 Aug 2020 - 7:28

24

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does boolean matrix factorization have to be boolean?

Published on 05 Aug 2020 - 0:41

26

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Write a 2-D matrix based on the sum of some 2-D basis

Published on 30 Mar 2026 - 14:21

50

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Matrix function of two arguments.

Published on 09 Aug 2020 - 16:03

440

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Finding the LU decomposition of a matrix using the shortcut method

Published on 25 Mar 2026 - 14:03

462

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In the Cholesky decomposition, the argument of the square root is always positive if the matrix is real and positive definite. Why?

Published on 25 Mar 2026 - 14:35

84

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Upper bound in bayesian regression setting

Published on 04 Apr 2026 - 1:48

249

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Calculating cosine-sine decomposition of a $4 \times 4$ unitary matrix?

Published on 26 Mar 2026 - 10:45

460

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Diagonal entries of $U$ in $LU$ factorisation of positive definite matrix

Published on 25 Mar 2026 - 14:07

87

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Can we decompose an array of algebraic expressions into a product of matrices that separate known variables from unknowns?

Published on 25 Mar 2026 - 15:51

119

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Ridge regression estimator in high-dimensions: is $(X^TX + \epsilon I_p)^{-1}X^Ty$ finite as $\epsilon \rightarrow 0$?

Published on 30 Mar 2026 - 0:22

List Question

QR factorization of tridiagonal matrix

Decomposing PSD block matrix into two PSD block matrices

Uniqueness of the Jordan decomposition

Getting rid of not invertible matrices

There is a unique QR factorization of any matrix $A$ that has full column rank — true or false?

does boolean matrix factorization have to be boolean?

Write a 2-D matrix based on the sum of some 2-D basis

Matrix function of two arguments.

Finding the LU decomposition of a matrix using the shortcut method

In the Cholesky decomposition, the argument of the square root is always positive if the matrix is real and positive definite. Why?

Upper bound in bayesian regression setting

Calculating cosine-sine decomposition of a $4 \times 4$ unitary matrix?

Diagonal entries of $U$ in $LU$ factorisation of positive definite matrix

Can we decompose an array of algebraic expressions into a product of matrices that separate known variables from unknowns?

Ridge regression estimator in high-dimensions: is $(X^TX + \epsilon I_p)^{-1}X^Ty$ finite as $\epsilon \rightarrow 0$?

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