Federico Poloni's user avatar
Federico Poloni's user avatar
Federico Poloni's user avatar
Federico Poloni
  • Member for 14 years, 4 months
  • Last seen this week
3 votes

Number of parameters needed to specify a Hermitian matrix of rank r.

3 votes
Accepted

How to derive the solution of Tikhonov Regularization via SVD

3 votes

Determinant of $Z^TZ$

3 votes

Fast and reliable positive real root of cubic

3 votes

Factorization of a Markov chain as the product of smaller chains

3 votes

Can a perturbation of a matrix product always be represented as product of perturbations of its factor matrices?

3 votes
Accepted

Numerical ways of solving $\det(A(x)) = 0$

3 votes
Accepted

SOLVED: How to retrieve Eigenvectors from QR algorithm that applies shifts and deflation

3 votes
Accepted

Tighest Gap $\|x\|_1/\|x\|_2$ between $\ell^1$ and $\ell^2$ norms

3 votes

Simplest representation of the inverse of an identity matrix plus a positive matrix

3 votes
Accepted

Making a real matrix positive definite by replacing nonzero and nondiagonal entries with arbitrary nonzero reals

3 votes

Two equivalent descriptions of a physical system yielding a non-trivial mathematical formula

3 votes
Accepted

How to find the set of vectors which are as nearly orthogonal as possible?

3 votes
Accepted

Source of equation - theorems about solving quadratic matrix equations

3 votes

Compute inverse series for implicit equation $b=-\log(1-e^{-x})/x$

3 votes
Accepted

Algorithm for Computing Kronecker's Canonical Form for Matrix Pencils

3 votes
Accepted

What is a one-parameter Newton's method?

3 votes

How to generate $n$ FP32 rationals s.t. no two distinct k-el. subsets have same sum?

3 votes
Accepted

Sensitivity of the range of a matrix

3 votes
Accepted

What are the upper bound and stability conditions for the following simple linear system?

3 votes

The set of matrices with same spectral radius

3 votes

Parametrising a sparse orthogonal matrix

3 votes
Accepted

Bounding the Frobenius norm of orthogonalised matrices

3 votes

Matrix-valued periodic Fibonacci polynomials

3 votes

How to solve a quadratic matrix equation with positive semidefinite constraint?

3 votes
Accepted

Matrix factorization for dimensional reduction similar to spectral decomposition/SVD

3 votes

Eigenvalues of a matrix sum

3 votes
Accepted

Updating the null space of a matrix

3 votes
Accepted

For the purposes of solving linear equations, is there a fast decomposition that works for all Hermitian matrices?

3 votes
Accepted

Are there matrices $C,D,E$ such that $AXA^T = B \iff CX^{-1}D = E?$

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