Add dot for XTensorVariables #1448
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Add dot operation to xtensor module
This PR adds support for the dot product operation in the xtensor module. The implementation includes:
New dot method
.dot()method toXTensorVariableinpytensor/xtensor/type.pyto provide a consistent interface for dot operations, similar to other math functions.Rewrite rule for dot
pytensor/xtensor/rewriting/math.pythat converts theXDotoperation to a tensor-based dot operation usingtensordot. This rule handles dimension alignment and contraction correctly.Import of math rewriting module
pytensor/xtensor/rewriting/__init__.pyto import the math rewriting module, ensuring that the dot rewrite rule is registered and available during the rewrite pass.Unit tests
test_dot()intests/xtensor/test_math.pyto verify the basic functionality of the dot operation, including matrix-matrix and matrix-vector dot products, proper dimension handling, and shape validation.These changes ensure that the xtensor module now supports dot operations, maintaining consistency with other math functions and enabling proper dimension handling for tensor contractions.
📚 Documentation preview 📚: https://pytensor--1448.org.readthedocs.build/en/1448/