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Theorem brcnvssr 39321
Description: The converse of a subset relation swaps arguments. (Contributed by Peter Mazsa, 1-Aug-2019.)
Assertion
Ref Expression
brcnvssr (𝐴𝑉 → (𝐴 S 𝐵𝐵𝐴))

Proof of Theorem brcnvssr
StepHypRef Expression
1 relssr 39315 . . 3 Rel S
21relbrcnv 6107 . 2 (𝐴 S 𝐵𝐵 S 𝐴)
3 brssr 39316 . 2 (𝐴𝑉 → (𝐵 S 𝐴𝐵𝐴))
42, 3bitrid 286 1 (𝐴𝑉 → (𝐴 S 𝐵𝐵𝐴))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wb 209  wcel 2145  wss 3902   class class class wbr 5107  ccnv 5658   S cssr 38921
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-ext 2734  ax-sep 5255  ax-pr 5402
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2100  df-clab 2741  df-cleq 2754  df-clel 2837  df-ral 3079  df-rex 3089  df-rab 3415  df-v 3455  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4283  df-if 4486  df-sn 4588  df-pr 4590  df-op 4594  df-br 5108  df-opab 5172  df-xp 5665  df-rel 5666  df-cnv 5667  df-ssr 39313
This theorem is used by:  brcnvssrid  39322  br1cossxrncnvssrres  39323  dfcnvrefrels2  39343  dfcnvrefrels3  39344
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