François Fleuret shares an AI exchange on avoiding numerical drift with mod-2π cumsum
francoisfleuret · x · 2026-10-30
François Fleuret shared a screenshot of a technical exchange: a commenter suggested a dedicated modulo-2π cumsum to avoid numerical precision problems in cumulative phase sums. The reply confirms the phase lives in R/2πZ — wrapping during the scan leaves the cosine unchanged and avoids large cumulative angles — and commits to implementing it with a segmented reverse sum for gradients. "I like the droids," Fleuret writes.
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