SAM's failure in language modeling is traced to a dominant 'logit path' that minimizes sharpness spuriously, and the proposed Functional-SAM, which removes that path, improves validation loss over AdamW and SAM.
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Avoiding spurious sharpness minimization broadens applicability of SAM
SAM's failure in language modeling is traced to a dominant 'logit path' that minimizes sharpness spuriously, and the proposed Functional-SAM, which removes that path, improves validation loss over AdamW and SAM.