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Theorem disjssi 38726
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 38725 . 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 3964   Disj wdisjALTV 38208
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1966  ax-7 2006  ax-8 2109  ax-9 2117  ax-10 2140  ax-11 2156  ax-12 2176  ax-ext 2707  ax-sep 5303  ax-nul 5313  ax-pr 5439
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1541  df-fal 1551  df-ex 1778  df-nf 1782  df-sb 2064  df-clab 2714  df-cleq 2728  df-clel 2815  df-ral 3061  df-rex 3070  df-rab 3435  df-v 3481  df-dif 3967  df-un 3969  df-in 3971  df-ss 3981  df-nul 4341  df-if 4533  df-sn 4633  df-pr 4635  df-op 4639  df-br 5150  df-opab 5212  df-id 5584  df-xp 5696  df-rel 5697  df-cnv 5698  df-co 5699  df-dm 5700  df-rn 5701  df-res 5702  df-coss 38405  df-cnvrefrel 38521  df-funALTV 38676  df-disjALTV 38699
This theorem is referenced by:  disjimres  38744  disjimin  38745
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