Registry · Definition
IV.D26
established
formalized
IV.D26 — SI Reference Table
SI physical constants stored as exact scaled Nat pairs. 4 exact constants (c, h, e, k_B from 2019 SI revision) plus Avogadro N_A. Structure: name, numer, denom, denom_pos, is_exact.
Book IV
Part 2
Ch. 12