A1.r — Chirikov standard-map density on a Klein bottle
Curve-Sim
x·y·A·n² + D²/4  =  D·A·n² + (D/2)² — stableswap invariant (n=2)
p↑(n) = p_base·((A−1)/A)ⁿ — LLAMMA band ladder
fee = max(f, dfee_oracle, ¼·|p_o − p_band|/p_o) — dynamic fee