Metamath Proof Explorer


Theorem dffunsALTV

Description: Alternate definition of the class of functions. (Contributed by Peter Mazsa, 18-Jul-2021)

Ref Expression
Assertion dffunsALTV FunsALTV = f Rels | f CnvRefRels

Proof

Step Hyp Ref Expression
1 df-funsALTV FunsALTV = Funss Rels
2 df-funss Funss = f | f CnvRefRels
3 1 2 abeqin FunsALTV = f Rels | f CnvRefRels