An Einstein-like Equation for Consciousness: A Geometric Framework for Subjective Time and Temporal Stretch

Added a formatted Japanese summary PDF; the English paper PDF is unchanged from v2 (included for convenience). 日本語要約PDF(整形版)を追加。英文PDFはv2と同一内容(利便性のため同梱)。 This work was prepared with assistance from a conversational AI tool (ChatGPT) for conceptual organization, drafting/editing, mathematical formalization, consistency checks, and validation planning.The AI is not a co-author; the author assumes full responsibility for the final content, accuracy, originality, and citation correctness. 本稿の作成では、対話型生成AI(ChatGPT)を補助的に使用し、概念整理・文章化・推敲、数式化や整合性確認、検証方針の検討等の支援を受けた。AIは共著者ではなく、最終原稿の内容・正確性・独創性・引用の適切性に関する責任は著者が負う。