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Theorem brcnvssr 39263
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 39257 . . 3 Rel S
21relbrcnv 6108 . 2 (𝐴 S 𝐵𝐵 S 𝐴)
3 brssr 39258 . 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 2142  wss 3904   class class class wbr 5108  ccnv 5659   S cssr 38863
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1824  ax-4 1838  ax-5 1939  ax-6 1996  ax-7 2037  ax-8 2144  ax-9 2152  ax-ext 2734  ax-sep 5256  ax-pr 5403
This proof depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1104  df-tru 1572  df-fal 1582  df-ex 1809  df-sb 2096  df-clab 2741  df-cleq 2754  df-clel 2837  df-ral 3079  df-rex 3089  df-rab 3416  df-v 3456  df-dif 3907  df-un 3909  df-in 3911  df-ss 3921  df-nul 4286  df-if 4487  df-sn 4589  df-pr 4591  df-op 4595  df-br 5109  df-opab 5173  df-xp 5666  df-rel 5667  df-cnv 5668  df-ssr 39255
This theorem is used by:  brcnvssrid  39264  br1cossxrncnvssrres  39265  dfcnvrefrels2  39285  dfcnvrefrels3  39286
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