Theorem ttcidm

Description: The transitive closure operation is idempotent. (Contributed by Matthew House, 6-Apr-2026)

	Ref	Expression
Assertion	ttcidm	Could not format assertion : No typesetting found for |- TC+ TC+ A = TC+ A with typecode |-

Proof

Step	Hyp	Ref	Expression
1		ttctr	Could not format Tr TC+ A : No typesetting found for |- Tr TC+ A with typecode |-
2		ttctrid	Could not format ( Tr TC+ A -> TC+ TC+ A = TC+ A ) : No typesetting found for |- ( Tr TC+ A -> TC+ TC+ A = TC+ A ) with typecode |-
3	1 2	ax-mp	Could not format TC+ TC+ A = TC+ A : No typesetting found for |- TC+ TC+ A = TC+ A with typecode |-