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Theorem cosscnvex 39443
Description: If 𝐴 is a set then the class of cosets by the converse of 𝐴 is a set. (Contributed by Peter Mazsa, 18-Oct-2019.)
Assertion
Ref Expression
cosscnvex (𝐴 ∈ 𝑉 → ≀ ◡𝐴 ∈ V)

Proof of Theorem cosscnvex
StepHypRef Expression
1 cnvexg 7936 . 2 (𝐴 ∈ 𝑉 → ◡𝐴 ∈ V)
2 cossex 39442 . 2 (◡𝐴 ∈ V → ≀ ◡𝐴 ∈ V)
31, 2syl 18 1 (𝐴 ∈ 𝑉 → ≀ ◡𝐴 ∈ V)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ∈ wcel 2144  Vcvv 3450  ◡ccnv 5649   ≀ ccoss 39116
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1827  ax-4 1841  ax-5 1942  ax-6 1999  ax-7 2040  ax-8 2146  ax-9 2154  ax-ext 2732  ax-sep 5248  ax-pow 5326  ax-pr 5390  ax-un 7751
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1572  df-fal 1582  df-ex 1812  df-sb 2099  df-clab 2739  df-cleq 2752  df-clel 2835  df-ral 3077  df-rex 3087  df-rab 3413  df-v 3452  df-ss 3896  df-dif 4047  df-in 4091  df-un 4151  df-nul 4279  df-if 4482  df-pw 4558  df-sn 4584  df-pr 4586  df-op 4590  df-uni 4867  df-br 5103  df-opab 5167  df-xp 5656  df-rel 5657  df-cnv 5658  df-co 5659  df-dm 5660  df-rn 5661  df-coss 39434
This theorem is used by:  eldisjsdisj  39757
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