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PyTensor allows you to define, optimize, and efficiently evaluate mathematical expressions involving multi-dimensional arrays.

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### Description The Aarray API standard has a name for this: https://data-apis.org/array-api/draft/design_topics/data_dependent_output_shapes.html Propose renaming it to `data_dependent_output_shapes` for discoverability / standardization. https://github.com/pymc-devs/pytensor/blob/19dafe42e2b34037b0f906d61116fa0d1de5025c/pytensor/graph/op.py#L198-L205 We should also document it in the Op...

docs
beginner friendly
maintenance

### Description Mentioned in https://github.com/pymc-devs/pytensor/pull/1046#pullrequestreview-2545416966

maintenance

Related to #189 This PR implements a new low level `Loop` `Op` which can be easily transpiled to `Numba` (the Python perform method takes 9 lines, yay to not having...

major
request discussion
scan

Right now we have `grad`, `L_op`, `R_op`. ## Deprecate `grad` in favor of `L_op`: `grad` is exactly the same as `L_op` except it doesn't have access to the outputs of...

request discussion
gradients

### Description In https://github.com/pymc-devs/pytensor/pull/1178 we rewrite batched dots that are just multiplication away, but left core dots the same due to use of BLAS operations for those (whether they are...

beginner friendly
graph rewriting

There was some convoluted logic in Elemwise perform method to create the python perform callable. In old times, Theano tried to fallback to the C-impl when the number of operands...

### Description https://github.com/pymc-devs/pytensor/pull/1193 showed many print statements that are likely better as log records. We should change them, but they have to be reviewed on a per basis

maintenance

### Description We currently use `np.linalg.svd`, which doesn't support `compute_uv = True`, or inplace flags. The relevant LAPACK functions to get full functionality are [gesdd ](https://netlib.org/lapack/explore-html/df/d22/group__gesdd.html) and [gesvd](https://netlib.org/lapack/explore-html/d1/d7f/group__gesvd.html).

numba
backend compatibility
SciPy compatibility
linalg

### Description https://data-apis.org/array-api/latest/index.html The standard considers lazy graph libraries so we should be fine. The only large difference I saw was that the `.shape` attribute should return a tuple of...

### Description Similarly to how we approached `Kv`/`Kve` in #1081, we only need one core Op: `Ive`. We should include the equivalent `log(iv(x))` rewrite for stability, where `iv` is the...

beginner friendly
maintenance
graph rewriting
Op implementation
SciPy compatibility