Theorem bj-evalfun

Description: The evaluation at a class is a function. (Contributed by BJ, 27-Dec-2021)

	Ref	Expression
Assertion	bj-evalfun	$$⊢\mathrm{Fun}\mathrm{Slot}A$$

Proof

Step	Hyp	Ref	Expression
1		df-slot	$$⊢\mathrm{Slot}A=\left(f\in \mathrm{V}⟼f\left(A\right)\right)$$
2	1	funmpt2	$$⊢\mathrm{Fun}\mathrm{Slot}A$$