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Theorem disjssi 36822
Description: Subclass theorem for disjoints, inference version. (Contributed by Peter Mazsa, 28-Sep-2021.)
Hypothesis
Ref Expression
disjssi.1 𝐴𝐵
Assertion
Ref Expression
disjssi ( Disj 𝐵 → Disj 𝐴)

Proof of Theorem disjssi
StepHypRef Expression
1 disjssi.1 . 2 𝐴𝐵
2 disjss 36821 . 2 (𝐴𝐵 → ( Disj 𝐵 → Disj 𝐴))
31, 2ax-mp 5 1 ( Disj 𝐵 → Disj 𝐴)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wss 3891   Disj wdisjALTV 36346
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1801  ax-4 1815  ax-5 1916  ax-6 1974  ax-7 2014  ax-8 2111  ax-9 2119  ax-10 2140  ax-11 2157  ax-12 2174  ax-ext 2710  ax-sep 5226  ax-nul 5233  ax-pr 5355
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1544  df-fal 1554  df-ex 1786  df-nf 1790  df-sb 2071  df-clab 2717  df-cleq 2731  df-clel 2817  df-ral 3070  df-rex 3071  df-rab 3074  df-v 3432  df-dif 3894  df-un 3896  df-in 3898  df-ss 3908  df-nul 4262  df-if 4465  df-sn 4567  df-pr 4569  df-op 4573  df-br 5079  df-opab 5141  df-id 5488  df-xp 5594  df-rel 5595  df-cnv 5596  df-co 5597  df-dm 5598  df-rn 5599  df-res 5600  df-coss 36516  df-cnvrefrel 36622  df-funALTV 36772  df-disjALTV 36795
This theorem is referenced by:  disjimres  36837  disjimin  36838
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