Alexander Held

ak.sum segfault: backport v2 solution into v1

6

### Version of Awkward Array 1.7.0 ### Description and code to reproduce ```python import awkward as ak import numpy as np v = ak.from_iter([[[1, 2, 3], [4, 5]], [[3, 4,...

Matrix multiplication (@ operator) is broken and needs to be ported to kernels (out of Numba)

2

### Version of Awkward Array 1.7.0 ### Description and code to reproduce While trying to use awkward arrays in matrix multiplication, I ran into two different kinds of unexpected behavior....

Warnings with pytorch backend and simplemodels

1

### Summary I ran into two warnings with the `pytorch` backend, see below. I have not tried to look at where exactly they come from so far. ### OS /...

Staterror issues with partially fixed bins due to to zero yields

3

### Summary The changes to `staterror` handling after 0.6.3 can result in some crashes due to unsupported treatment of partially fixed parameters (fixed modifiers in some bins but not in...

"Optimization terminated successfully." when HESSE fails after MIGRAD

9

### Summary When HESSE fails after MIGRAD with the `minuit` backend, the resulting error is accompanied by a misleading "Optimization terminated successfully." message. This happens since the status is queried...

Documentation of default Minuit strategy choice

1

### Summary The documentation of `minuit_optimizer` lists `strategy` as a possible kwarg with default value of `None`, but it does not explain what that choice leads to. `pyhf` uses `0`/`1`...

### Summary The `set_backend` documentation currently mentions that the default precision is backend-dependent. That is technically true (the settings are assigned on a per-backend basis), but the default is 64b...

Correlated shapesys across channels

2

### Summary It is possible in `0.7.0rc1` to correlate `shapesys` modifiers across channels, and these modifiers behave in strange ways. `0.6.3` raised an error instead. ### OS / Environment ```console...

Collect supported kwargs for fits in one central place

1

### Summary When looking for supported kwargs for something like `pyhf.infer.mle.fit` in conjunction with Minuit, I believe that I need to check in three places: - https://pyhf.readthedocs.io/en/v0.6.3/_generated/pyhf.infer.mle.fit.html for model-related configuration,...

Multiple staterror modifiers per sample and channel, round trips and duplicate modifiers

3

### Summary In the context of #760 I was wondering what would happen in a setup that exploits the fact that `pyhf` allows customizing parameter names for `staterror` modifiers to...