What I learned today

  GRM: Arithmetic, Homotopy, and Geometry The Homology–Homotopy Frontier in Arithmetic Geometry Front Matter F.1 Preface: Arithmetic Geometry as a Reconstruction Problem F.1.1 The classical arithmetic viewpoint F.1.2 Arithmetic through linear invariants F.1.3 Arithmetic through structured path spaces F.1.4 Homology, homotopy, and information loss F.1.5 Why non-abelian structure is not automatically better F.1.6 Reconstruction before escalation F.1.7 The role of explicit computation F.2 The GRM Architecture of the Book F.2.1 Source structure F.2.2 Representation structure F.2.3 Arithmetic observables F.2.4 Obstructions F.2.5 Structural lifts F.2.6 Minimal sufficient invariants F.2.7 Closure and reopening F.2.8 Research-frontier generation F.3 Mathematical Conventions F.3.1 Fields and places F.3.2 Curves and basepoints F.3.3 Fundamental groups and groupoids F.3.4 Galois cohomology F.3.5 Filtrations F.3.6 Tannakian notation F.3.7 Selmer notation F.3.8 Period notation F.4 Running Examp...

  Arithmetic, Homotopy, and Geometry The Homology–Homotopy Frontier in Arithmetic Geometry Course level Advanced graduate / beginning research seminar in arithmetic geometry. Format 14-week course. Course level: advanced graduate / beginning research seminar in arithmetic geometry. Format: fourteen weeks, two 90-minute lectures per week, with a weekly 60–90 minute problem, computation, or reading seminar. The course assumes basic algebraic number theory, schemes and morphisms, smooth projective curves and Jacobians, Galois theory and profinite groups, homological algebra, basic sheaf cohomology, and elementary (p)-adic analysis. Étale cohomology, algebraic groups, category theory, motives, deformation theory, (p)-adic Hodge theory, and homotopical algebra are useful but are developed as needed. The governing problem is to determine how much arithmetic information is visible after successive linearizations and how much requires retention of genuinely non-abelian structure. The recur...

Biological Memory: A GRM/Base-T Reconstruction Table of Contents Part I — Scope: What Counts as Memory? 1. The Boundary Problem 1. What This Book Means by Biological Memory 1.1 Nervous-system memory as the target domain 1.2 Why immune “memory” is outside scope 1.3 Shared terminology does not establish shared mechanism 1.4 Memory as experience-dependent modification of later reconstruction 1.5 Memory as history acting on future behavior 1.6 Storage, reconstruction and readout as different problems 1.7 Memory is not a photograph of the past 1.8 Memory is not equivalent to behavior 1.9 Memory is not equivalent to conscious recall 1.10 Memory is not equivalent to consolidation 2. The Central Architecture 2.1 Experience 2.2 Encoding 2.3 Distributed relational change 2.4 Immediate reuse 2.5 Replay 2.6 Reorganization 2.7 Multiple access paths 2.8 Contextual reconstruction 2.9 Narrow control layer 2.10 Behavioral or conscious readout Core progression: \[ \boxed{ \text{experience} \rightarrow...