wegamekinglc / Derivatives-Algorithms-Lib / 30166286588

Build # 30166286588

Build Type

push

github

Committed by web-flow

Commit Message

fix: DAL-7 handle exact Krylov residuals (#258)

* Fix zero-residual Krylov solves

Return before the first CG/BCG update when the supplied initial guess has an exact zero residual, avoiding a 0/0 search step and exhausted-iteration failures.

Co-authored-by: multica-agent <github@multica.ai>

* Preserve underflowed Krylov residuals

Limit the exact-residual shortcut to vectors whose components are all zero, so representable nonzero residuals continue through CG and BCG even when their squared norm underflows.

Co-authored-by: multica-agent <github@multica.ai>

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Co-authored-by: dal-implementer <dal-implementer@multica.local>
Co-authored-by: multica-agent <github@multica.ai>

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