Collected Abstracts: The Twenty Papers in Twenty Paragraphs

This is the collected-abstracts paper for the arc 2026a–2026u. It does not prove a new theorem. It collects, in order, one paragraph per paper, for all twenty-one papers, so a reader can see the whole arc in one place. In 2026a (Ch. 124), we proved no unital map T → E for H = S^1. In 2026b (Ch. 125), we generalized to the triple (dim H^n, dim C^n, 1). In 2026c (Ch. 138), we defined the Bridge Conjecture. In 2026d (Ch. 139), we proved the eraser must be CPTP. In 2026e (Ch. 140), we proved all four follow from one Unifier Axiom: [x,y] = 1. In 2026f (Ch. 141), we categorified H. In 2026g (Ch. 142), we proved the Unifier survives in characteristic p. In 2026h (Ch. 143), we proved it survives for infinite H. In 2026i (Ch. 144), we gave the lab falsifier D^2 + V^2 ≤ 1. In 2026j (Ch. 145), we proved the nine papers are one theorem. In 2026k (Ch. 146), we proved the Unifier survives for any A with [x,y] = 1. In 2026l (Ch. 147), we constructed H(M) for M Lorentzian. In 2026m (Ch. 148), we defined causal homotopy, π1^causal, and H1^causal. In 2026n (Ch. 149), we defined H^n_causal(H(M)) for all n. In 2026o (Ch. 150), we proved the fourteen papers are one theorem. In 2026p (Ch. 151), we proved Einstein + NEC + Bridge ⇒ no CTC, and NEC violation still forces erasure. In 2026q (Ch. 152), we proved quantum M still forces erasure, branch + interference. In 2026r (Ch. 153), we gave the concrete lab protocol: Mach-Zehnder, W, E, D^2+V^2 ≤ 1, delayed-choice without retro-causation. In 2026s (Ch. 154), we proved the eighteen papers are one theorem. In 2026t (Ch. 155), we listed the open problems: NEC, M-Hat, lab, weaker Unifier, concrete H^1_causal, categorical F, joint char p + infinite + QFT. In 2026u (Ch. 156), we gave the index: twenty papers, one page, one falsifier, one reading path. By 2026s, the twenty-one papers stand or fall together. By 2026t, the open questions are: NEC, M-Hat, lab. By 2026u, the map is one page. This paper is the twenty paragraphs. Tseglin 2026v = Ch. 157. Cites Tseglin 2026a DOI 10.5281/zenodo.23977165, 2026b DOI 10.5281/zenodo.23980498, 2026c DOI 10.5281/zenodo.23980738, 2026d DOI 10.5281/zenodo.23981860, 2026e DOI 10.5281/zenodo.23982063, 2026f DOI 10.5281/zenodo.23982359, 2026g DOI 10.5281/zenodo.23985216, 2026h DOI 10.5281/zenodo.23991367, 2026i DOI 10.5281/zenodo.23991442, 2026j DOI 10.5281/zenodo.23991535, 2026k DOI 10.5281/zenodo.23991603, 2026l DOI 10.5281/zenodo.23991665, 2026m DOI 10.5281/zenodo.23991998, 2026n DOI 10.5281/zenodo.23992083, 2026o DOI 10.5281/zenodo.23992187, 2026p DOI 10.5281/zenodo.23992267, 2026q DOI 10.5281/zenodo.23992317, 2026r DOI 10.5281/zenodo.23992397, 2026s DOI 10.5281/zenodo.23992535, 2026t DOI 10.5281/zenodo.23992634, 2026u DOI 10.5281/zenodo.23992755.