Compare any two ISAR dialects side-by-side. Different surface syntax, same InvariantLayer quotient — extensionally equal terms collapse to the same normal form. ISAR.morphism_uniqueness
Enter an ITerm-kernel expression. Both dialects compile it to ITerm; the shared normal form in InvariantLayer demonstrates extensional collapse.
Iterating ι-application produces a closed orbit mapping to the four ISAR basis matrices. ISAR.Iota_Dialect