Johanna Haffner

Question: `filter_shard` with PartitionSpecs, or other ways to ensure batched output, as in `vmap`.

3

Hi again! I have yet another question, this time to do with sharding. Essentially, I'm trying to shard to improve performance, but I would like the output to be the...

Steady-state event occurs immediately if state with large value constant

7

Hi Patrick, I noticed that steady state events occur much earlier if a state with a large value is constant. This behavior occurs irrespective of the `optx.norm` specified, even though...

Genuinely confused about the usage of dfx.RESULTS

2

Alright, this is a very minor issue and there is no time pressure at all. I don't get how dfx.RESULTS[result] works, and so far I work around it by accessing...

Draft:: Implement box constraints for the Nelder Mead solver, to increase its robustness on messy data where bounds are known.

15

I'm using Nelder-Mead to fit a variance model to residuals. On real data, the solve diverges frequently. I followed the advice in #45 and implemented bounds in the `options` passed...

jax.lax.linalg.lu returns LU factorisation for singular matrix, jax.scipy.linalg.lu_solve silently returns spurious result in 32bit

2

### Description Singular matrix with linearly dependent columns have infinitely many LU factorisations. However, the lax implementation of LU factorisation will return a factorisation regardless. This will then fail to...

Creating JacobianLinearOperator fails with confusing error

2

I'm getting a confusing error when trying to create a `JacobianLinearOperator`. - `lx.JacobianLinearOperator(f, x0)` causes `TypeError: f() takes 1 positional argument but 2 were given`, - `lx.JacobianLinearOperator(f)` causes `TypeError: JacobianLinearOperator.__init__()...

Failure to raise error for ill-posed system if using LU and 32-bit

2

When using `AutoLinearOperator` with `well_posed=True` and no tags specifying some structure, the LU solver is used. LU wraps the `jax.scipy` implementation and raises an error if the output has `NaN`...

Clarification on Supported PowerPoint Versions for IguanaTex (macOS)

2

I am experiencing an issue while using IguanaTex on macOS. Specifically, I'm encountering `runtime error '5' (Invalid procedure call or argument)` when trying to generate even simple LaTeX content through...

Implementation of matrix equilibration routines (Ruiz equilibration for OSQP)

1

Hi Patrick, I'm interested in implementing matrix equilibration routines to improve the optimistix version of [OSQP](https://arxiv.org/pdf/1711.08013), in which they use a Ruiz equilibration (rows are scaled to be equal in...

This PR is a proposal for what integration of benchmarks could look like. I suggest: - keeping a separate benchmark tests - running these with the usual familiar testing machinery...