Trivializing permutation coboundaries on the original fibre
Abstract
Trivializing permutation coboundaries on the original fibre.
Definition 1.1 (finiteFibreHomeomorph).
Lean statement: D5/S1/Dynamics/Symbolic/PermutativeLifts/FiniteActionTrivialization.finiteFibreHomeomorph
Formalization. D5/S1/Dynamics/Symbolic/PermutativeLifts/FiniteActionTrivialization.finiteFibreHomeomorph (✓ std3).
Source. Repository-derived.
Commentary.
A continuous permutation-valued transfer changes only the original discrete fibre coordinate; its inverse uses the transfer itself.
Theorem 1.2 (finiteFibreHomeomorph_conjugacy).
Lean statement: D5/S1/Dynamics/Symbolic/PermutativeLifts/FiniteActionTrivialization.finiteFibreHomeomorph_conjugacy
Proof. Machine-checked in Lean as D5/S1/Dynamics/Symbolic/PermutativeLifts/FiniteActionTrivialization.finiteFibreHomeomorph_conjugacy (✓ std3). ∎
Source. Repository-derived.
Commentary.
The transfer equation conjugates the skew step to the base step times the identity on the original fibre.
Theorem 1.3 (invariant_of_unitStep).
Lean statement: D5/S1/Dynamics/Symbolic/PermutativeLifts/FiniteActionTrivialization.invariant_of_unitStep
Proof. Machine-checked in Lean as D5/S1/Dynamics/Symbolic/PermutativeLifts/FiniteActionTrivialization.invariant_of_unitStep (✓ std3). ∎
Source. Repository-derived.
Commentary.
Invariance of a map under the integer generator implies invariance under every signed integer iterate.
References
- Truth anchor:
D5/S1/Dynamics/Symbolic/PermutativeLifts/FiniteActionTrivialization.finiteFibreHomeomorph - Truth anchor:
D5/S1/Dynamics/Symbolic/PermutativeLifts/FiniteActionTrivialization.finiteFibreHomeomorph_conjugacy - Truth anchor:
D5/S1/Dynamics/Symbolic/PermutativeLifts/FiniteActionTrivialization.invariant_of_unitStep