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Decompose Tridiagonal Solve into core steps #1382

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@ricardoV94 ricardoV94 commented Apr 29, 2025

This PR builds on top of #1396, extending it to the tridiagonal case.

It also adds a rewrite for when extracting diagonals out a symbolically allocated diagonal matrix (via set_subtensor or AllocDiag after it gets inlined during specialization)

TODO:

  • Numba implementation and exclusion from other backends rewrites

@ricardoV94 ricardoV94 force-pushed the decompose_tridiagonal_solve branch from cc4fab6 to c72326e Compare May 7, 2025 05:27
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@ricardoV94 ricardoV94 force-pushed the decompose_tridiagonal_solve branch 2 times, most recently from c9caeca to df0ec58 Compare May 7, 2025 17:05
@ricardoV94 ricardoV94 force-pushed the decompose_tridiagonal_solve branch from df0ec58 to 2436cd1 Compare May 8, 2025 15:51
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