https://mert-g.org/blog/ Monthly notes accompanying the manuscripts: optimization, machine learning, and applied probability. en https://mert-g.org/blog/2026-07-fragile-acceleration/ https://mert-g.org/blog/2026-07-fragile-acceleration/ Wed, 15 Jul 2026 12:00:00 GMT Momentum buys a quadratic speedup — and pays for it in sensitivity to gradient errors. A guided tour of why that trade-off is a theorem, not an engineering accident, and how to design on the frontier instead of falling off it.