BLAST: E=K·m·n·exp(−λS); doubling n doubles E; S'=(λS−lnK)/ln2; anchor K=0.1,m=1000,n=10⁶,λ=1,S=20

Layer 3 — Biologyin the computational-biology subtree

Sympy-exact symbolic witness of the BLAST Karlin-Altschul E-value canonical form together with its database-size-doubling invariant and bit-score rescaling. Setup: K, m, n, λ, S positive symbols (K = Karlin-Altschul pre-factor; m = query…

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