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Theorem dffunALTV2 38687
Description: Alternate definition of the function relation predicate, cf. dfdisjALTV2 38713. (Contributed by Peter Mazsa, 8-Feb-2018.)
Assertion
Ref Expression
dffunALTV2 ( FunALTV 𝐹 ↔ ( ≀ 𝐹 ⊆ I ∧ Rel 𝐹))

Proof of Theorem dffunALTV2
StepHypRef Expression
1 df-funALTV 38681 . 2 ( FunALTV 𝐹 ↔ ( CnvRefRel ≀ 𝐹 ∧ Rel 𝐹))
2 cnvrefrelcoss2 38535 . . 3 ( CnvRefRel ≀ 𝐹 ↔ ≀ 𝐹 ⊆ I )
32anbi1i 624 . 2 (( CnvRefRel ≀ 𝐹 ∧ Rel 𝐹) ↔ ( ≀ 𝐹 ⊆ I ∧ Rel 𝐹))
41, 3bitri 275 1 ( FunALTV 𝐹 ↔ ( ≀ 𝐹 ⊆ I ∧ Rel 𝐹))
Colors of variables: wff setvar class
Syntax hints:  wb 206  wa 395  wss 3917   I cid 5535  Rel wrel 5646  ccoss 38176   CnvRefRel wcnvrefrel 38185   FunALTV wfunALTV 38207
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-10 2142  ax-11 2158  ax-12 2178  ax-ext 2702  ax-sep 5254  ax-nul 5264  ax-pr 5390
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2066  df-clab 2709  df-cleq 2722  df-clel 2804  df-ral 3046  df-rex 3055  df-rab 3409  df-v 3452  df-dif 3920  df-un 3922  df-in 3924  df-ss 3934  df-nul 4300  df-if 4492  df-sn 4593  df-pr 4595  df-op 4599  df-br 5111  df-opab 5173  df-id 5536  df-xp 5647  df-rel 5648  df-cnv 5649  df-co 5650  df-dm 5651  df-rn 5652  df-res 5653  df-coss 38409  df-cnvrefrel 38525  df-funALTV 38681
This theorem is referenced by:  dffunALTV3  38688  dffunALTV4  38689  dffunALTV5  38690  funALTVss  38698
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