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Federico Poloni's user avatar
Federico Poloni's user avatar
Federico Poloni's user avatar
Federico Poloni
  • Member for 11 years, 1 month
  • Last seen this week
3 votes

Getting singular matrices for lid driven cavity problem

3 votes
Accepted

Products of the Householder matrices during QR decomposition

9 votes

Optimized Lanczos method for finding eigenvalues of $A \otimes B$

1 vote
Accepted

Auto differentiation with JAX in python and ForwardDiff.jl in Julia give matrices with different values but same structure. Are the results right?

12 votes

C, Julia, Python, Maxima, Mathematica, ChatGPT and numerical errors

7 votes

What is this regularization technique?

2 votes

What is the name of the theory that combines 3d discretized surfaces and distributed numerical algebra

6 votes
Accepted

How can I draw a regression line in log scale?

5 votes

Overlap matrix and its inverse matrix

3 votes

accuracy problem for a null space calculation on a sparse rectangular matrix

2 votes

Solving for $X$ in $\sum_{a,b} b a^T b^T X a = Y$

4 votes
Accepted

Solving underdetermined Lyapunov equation?

25 votes

More stable algorithm to calculate `sqrt(a^2 + b^2) - abs(a)` in MatLab

10 votes
Accepted

Why are all eigen solvers iterative?

5 votes
Accepted

Matrices that achieve worst-case $LDL^T$ element growth

4 votes

Float equality tolerance for single and half precision

4 votes

Reordering eigenvalues in Schur factorization - MATLAB ordschur and LAPACK dtrsen not producing the same results

3 votes

Factorize laplacian in terms of first derivative matrix

1 vote
Accepted

Can I find sines or cosines of rational parts of π without using radians? If not, how do I reduce the errors caused solely by the transcendence of π?

2 votes
Accepted

Conditioning and Stability of generalized eigenvalue problem

4 votes

Deformation matrix, Math hack for stability on large simulation steps?

5 votes
Accepted

Measuring the extent to which two sets of vectors span the same space

5 votes
Accepted

How should I solve generalized eigenvalue problems in Python? (Orr-Sommerfeld equation)

1 vote

Unable to calculate binomial coefficients correctly in matlab

1 vote

Numerically stable way to implement Cramer's rule analog

5 votes
Accepted

The error propagation in calculating the inverse using a matrix decomposition

8 votes
Accepted

How to design a sin and an arcsin function such that arcsin(sin(x))=x, where x is a finite precision floating point number

4 votes

Rank-1 correction of matrix exponential

3 votes
Accepted

Finding best phase in least-squares manner

3 votes

Faster than forward substitution?

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