Theorem fconst6

Description: A constant function as a mapping. (Contributed by Jeff Madsen, 30-Nov-2009) (Revised by Mario Carneiro, 22-Apr-2015)

	Ref	Expression
Hypothesis	fconst6.1	|- B e. C
Assertion	fconst6	|- ( A X. { B } ) : A --> C

Proof

Step	Hyp	Ref	Expression
1		fconst6.1	|- B e. C
2		fconst6g	|- ( B e. C -> ( A X. { B } ) : A --> C )
3	1 2	ax-mp	|- ( A X. { B } ) : A --> C