Coding threshold 16 < 20 ≤ 64: doublet capacity cannot encode 20 amino acids; triplet capacity can.
Biology
The discipline entrances are dictionary-level correspondences: a ladder built in the other party's language, withdrawn once climbed.
C₅ is solvable and A₅ is not (external anchor); this marks the outer boundary of the generative theory of molecular genetics.
64-group isomorphism: 64 = 4³ = 2⁶; codon space and hexagrams are isomorphic as (ℤ₂)⁶.
Li et al. 2004 yeast cell-cycle network (11 nodes, 34 edges) under the threshold (magnitude-component) model: 7 fixed points, basins [1764,151,109,9,7,7,1]; largest basin 1764 (86.1%) is the G1 steady state.
Rotor Whole-Genome Analyzer: software for gene-regulatory-network fate prediction and knockout scans using the rotor (phase + magnitude) engine.
There is a unique hexagram–object assignment (e.g. one hexagram = one specific codon).
"DNA is a musical code."