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I've encountered a problem where I'd like to find the square root of an upper triangular matrix. (I can provide more specifics if helpful, but this seems like a relatively generic problem users might …
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I am reading your paper . Your idea of using QR decomposition instead of traditional Schur Complement is awesome. I have run your source code `rootba`. The result image is shown in the end of the iss…
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Hi @haampie, is there a reason this package doesn't export a function `eigs` satisfying the old interface?
it looks like the correct way to use it is
```julia
function eigs(A; kwargs)
sc…
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In the current pyro GP library, GP objects like `GPRegression` recompute the full kernel matrix each time they are optimized https://github.com/uber/pyro/blob/dev/pyro/contrib/gp/models/gpr.py#L80
…
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Hi there,
I wanted to express my appreciation for the intriguing and innovative STT method you've developed. It's truly fascinating, and I've been excited to explore the example code you've provide…
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It seems the function linalg.logm is significantly slower than a naive way to compute the matrix logarithm using SVD.
If we compute the matrix logarithm of a random positive definite matrix, I see…
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I am mainly using Krylov based solvers with ILU preconditioner and IJ interface. I have observed that for some input matrices,
there is a convergence issue when more than one mpi processes have been …
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I am trying to compute eigenvalues of matrices with extended precision but the function `eigsolve` return an error. For example with the following matrix
```julia
using LinearAlgebra, LinearMaps, Qu…
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After tansition to PETSc 3.8.3 we have to definitely replace ilu preconditioner by icc because
of getting Inf in residual for very small conductivities (seems that diagonal scaling is not applied con…
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By accident, my program which is using `eigenvalues()` has become very good at constructing matrices which never converge during the search for their eigenvalues. Below is an example of such a matrix-…