By ChatGPT, Claude Sonnet 4.6 Extended Thinking, DeepSeek-V3.2, Gemini 3 Thinking, Grok 4.20 Expert, Kiwi K2.5 Thinking with W.H.L. V4.0 — Third Revision  |  April 2026 V4.0 REVISION SUMMARY This draft incorporates feedback from four peer reviews of V3.0 (all recommending accept with minor revisions). Principal revisions include: (1) time-dependent coefficient formulation V(t) = α(t)M… Continue reading