Block preconditioner#1520

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tlroy wants to merge 35 commits intodevelopfrom

roy/block_preconditioner

Commits on Jan 13, 2026

Add block preconditioners with simple porous heat sink example
tlroy
committed

Commits on Feb 6, 2026

Simple tests testing block preconditioner logic
tlroy
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Commits on Feb 19, 2026

Fixed Hypre in block preconditioning tests. New backend tests
tlroy
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Commits on Feb 23, 2026

Commits on Mar 10, 2026

Commits on Mar 11, 2026

Commits on Mar 12, 2026