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Orthogonality

Orthogonality describes structural independence among transformation operators.

An orthogonality rule describes whether two operators have distinct, shared, dependent, conflicting, inverse-like, or unresolved effect domains. It does not assert persistence.

Authority

The authoritative Lean definitions are in:

SETheoryTransformation/Relation/Orthogonality.lean
SETheoryTransformation/Reference/Orthogonality.lean

The reference registry mirror is in:

reference/orthogonality-rules.toml

Generated data artifacts are in:

data/transformation/orthogonality-matrix.json

Use

Orthogonality helps keep the operator vocabulary distinguishable.

It is a structural independence check, not a value judgment.

Rule

Orthogonality describes independence.
Composition describes sequencing.
Persistence is evaluated downstream.