Automatic Mixed Precision examples in the PyTorch documentation (source code)

= Automatic Mixed Precision examples in the PyTorch documentation
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https://docs.pytorch.org/docs/2.15/notes/amp_examples.html#gradient-accumulation

Pinned PyTorch2.15, Gradient accumulation subsection and example loop. Effective batch size and delayed optimizer step; normalization in the illustrated loop. Used only for gradient accumulation; no new mixed-precision article authored.