Theorem elttctr

Description: Transitivity of A e. TC+ B relationship. (Contributed by Matthew House, 6-Apr-2026)

	Ref	Expression
Assertion	elttctr	Could not format assertion : No typesetting found for |- ( ( A e. TC+ B /\ B e. TC+ C ) -> A e. TC+ C ) with typecode |-

Proof

Step	Hyp	Ref	Expression
1		ttcel	Could not format ( B e. TC+ C -> TC+ B C_ TC+ C ) : No typesetting found for |- ( B e. TC+ C -> TC+ B C_ TC+ C ) with typecode |-
2	1	sseld	Could not format ( B e. TC+ C -> ( A e. TC+ B -> A e. TC+ C ) ) : No typesetting found for |- ( B e. TC+ C -> ( A e. TC+ B -> A e. TC+ C ) ) with typecode |-
3	2	impcom	Could not format ( ( A e. TC+ B /\ B e. TC+ C ) -> A e. TC+ C ) : No typesetting found for |- ( ( A e. TC+ B /\ B e. TC+ C ) -> A e. TC+ C ) with typecode |-