Theorem dffunsALTV 39019

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 39017	. 2 ⊢ FunsALTV = ( Funss ∩ Rels )
2		df-funss 39016	. 2 ⊢ Funss = {𝑓 ∣ ≀ 𝑓 ∈ CnvRefRels }
3	1, 2	abeqin 38505	1 ⊢ FunsALTV = {𝑓 ∈ Rels ∣ ≀ 𝑓 ∈ CnvRefRels }

Syntax hints:   = wceq 1542   ∈ wcel 2114  {crab 3401   ≀ ccoss 38434   Rels crels 38436   CnvRefRels ccnvrefrels 38442   Funss cfunss 38465   FunsALTV cfunsALTV 38466

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-ext 2709

This theorem depends on definitions:  df-bi 207  df-an 396  df-tru 1545  df-ex 1782  df-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-rab 3402  df-v 3444  df-in 3910  df-funss 39016  df-funsALTV 39017

This theorem is referenced by:  dffunsALTV2  39020  dffunsALTV3  39021  dffunsALTV4  39022  elfunsALTV  39028