Theorem dffunsALTV 38675

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

Assertion

Ref	Expression
dffunsALTV	⊢ FunsALTV = {𝑓 ∈ Rels ∣ ≀ 𝑓 ∈ CnvRefRels }

Proof of Theorem dffunsALTV

Step	Hyp	Ref	Expression
1		df-funsALTV 38673	. 2 ⊢ FunsALTV = ( Funss ∩ Rels )
2		df-funss 38672	. 2 ⊢ Funss = {𝑓 ∣ ≀ 𝑓 ∈ CnvRefRels }
3	1, 2	abeqin 38241	1 ⊢ FunsALTV = {𝑓 ∈ Rels ∣ ≀ 𝑓 ∈ CnvRefRels }

Syntax hints:   = wceq 1540   ∈ wcel 2109  {crab 3405   ≀ ccoss 38169   Rels crels 38171   CnvRefRels ccnvrefrels 38177   Funss cfunss 38198   FunsALTV cfunsALTV 38199

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-ext 2701

This theorem depends on definitions:  df-bi 207  df-an 396  df-tru 1543  df-ex 1780  df-sb 2066  df-clab 2708  df-cleq 2721  df-clel 2803  df-rab 3406  df-v 3449  df-in 3921  df-funss 38672  df-funsALTV 38673

This theorem is referenced by:  dffunsALTV2  38676  dffunsALTV3  38677  dffunsALTV4  38678  elfunsALTV  38684