Notation Note — Symbol Canon v1.0 (2026-06-11)

The Python identifiers in this engine predate the Symbol Canon renames applied to the PA text in v2.0. Code identifiers are intentionally unchanged to preserve API stability; align them at the next engine release if desired.

Mapping between code identifiers and canonical symbols:

Code identifier	Canonical symbol (v2.0)	Object
`kappa` (aggregate)	⟨𝓚⁵⟩	Coherence Aggregate
`kappa_1` … `kappa_5`	𝓚_1 … 𝓚_5	Coherence Vector components (𝓚⁵)
`rho`, `rho_v`, `rho_d`, `rho_K`, `rho_tau`, `rho_R`	ρ, ρ_v, ρ_d, ρ_K, ρ_τ, ρ_R	Resonance Metric family (unchanged in text)
`C` space / coherent field	ℭ_h	Coherent Field
identity space `R`	𝕀	Identity Space (the Remir ℛ(I) is unchanged)
invariant `I_k`	ι_k	Invariants
collapse types `ALPHA/BETA/GAMMA/DELTA` (if present)	A / B / C / D	Collapse types (taxonomy shared with OCT)
target domain `D_target`, `D1`, `D2`	𝔻_target, 𝔻₁, 𝔻₂	Domains

Reference: SYMBOL_CANON_ORDINATIVE_SCIENCES (programme front-matter appendix) and PA Appendix A Canon Alignment Note.