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Theorem cnvexg 5071
Description: The converse of a set is a set. Corollary 6.8(1) of [TakeutiZaring] p. 26. (Contributed by NM, 17-Mar-1998.)
Assertion
Ref Expression
cnvexg (𝐴𝑉𝐴 ∈ V)

Proof of Theorem cnvexg
StepHypRef Expression
1 relcnv 4912 . . 3 Rel 𝐴
2 relssdmrn 5054 . . 3 (Rel 𝐴𝐴 ⊆ (dom 𝐴 × ran 𝐴))
31, 2ax-mp 5 . 2 𝐴 ⊆ (dom 𝐴 × ran 𝐴)
4 df-rn 4545 . . . 4 ran 𝐴 = dom 𝐴
5 rnexg 4799 . . . 4 (𝐴𝑉 → ran 𝐴 ∈ V)
64, 5eqeltrrid 2225 . . 3 (𝐴𝑉 → dom 𝐴 ∈ V)
7 dfdm4 4726 . . . 4 dom 𝐴 = ran 𝐴
8 dmexg 4798 . . . 4 (𝐴𝑉 → dom 𝐴 ∈ V)
97, 8eqeltrrid 2225 . . 3 (𝐴𝑉 → ran 𝐴 ∈ V)
10 xpexg 4648 . . 3 ((dom 𝐴 ∈ V ∧ ran 𝐴 ∈ V) → (dom 𝐴 × ran 𝐴) ∈ V)
116, 9, 10syl2anc 408 . 2 (𝐴𝑉 → (dom 𝐴 × ran 𝐴) ∈ V)
12 ssexg 4062 . 2 ((𝐴 ⊆ (dom 𝐴 × ran 𝐴) ∧ (dom 𝐴 × ran 𝐴) ∈ V) → 𝐴 ∈ V)
133, 11, 12sylancr 410 1 (𝐴𝑉𝐴 ∈ V)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 1480  Vcvv 2681  wss 3066   × cxp 4532  ccnv 4533  dom cdm 4534  ran crn 4535  Rel wrel 4539
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 698  ax-5 1423  ax-7 1424  ax-gen 1425  ax-ie1 1469  ax-ie2 1470  ax-8 1482  ax-10 1483  ax-11 1484  ax-i12 1485  ax-bndl 1486  ax-4 1487  ax-13 1491  ax-14 1492  ax-17 1506  ax-i9 1510  ax-ial 1514  ax-i5r 1515  ax-ext 2119  ax-sep 4041  ax-pow 4093  ax-pr 4126  ax-un 4350
This theorem depends on definitions:  df-bi 116  df-3an 964  df-tru 1334  df-nf 1437  df-sb 1736  df-eu 2000  df-mo 2001  df-clab 2124  df-cleq 2130  df-clel 2133  df-nfc 2268  df-ral 2419  df-rex 2420  df-v 2683  df-un 3070  df-in 3072  df-ss 3079  df-pw 3507  df-sn 3528  df-pr 3529  df-op 3531  df-uni 3732  df-br 3925  df-opab 3985  df-xp 4540  df-rel 4541  df-cnv 4542  df-dm 4544  df-rn 4545
This theorem is referenced by:  cnvex  5072  relcnvexb  5073  cofunex2g  6003  cnvf1o  6115  brtpos2  6141  tposexg  6148  cnven  6695  cnvct  6696  fopwdom  6723  relcnvfi  6822  ennnfonelemim  11926
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