Theorem thinccd

Description: A thin category is a category (deduction form). (Contributed by Zhi Wang, 24-Sep-2024)

	Ref	Expression
Hypothesis	thinccd.c	No typesetting found for |- ( ph -> C e. ThinCat ) with typecode |-
Assertion	thinccd	$$⊢\phi \to C\in \mathrm{Cat}$$

Proof

Step	Hyp	Ref	Expression
1		thinccd.c	Could not format ( ph -> C e. ThinCat ) : No typesetting found for |- ( ph -> C e. ThinCat ) with typecode |-
2		thincc	Could not format ( C e. ThinCat -> C e. Cat ) : No typesetting found for |- ( C e. ThinCat -> C e. Cat ) with typecode |-
3	1 2	syl	$$⊢\phi \to C\in \mathrm{Cat}$$