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Theorem fimacnvdisj 6636
Description: The preimage of a class disjoint with a mapping's codomain is empty. (Contributed by FL, 24-Jan-2007.)
Assertion
Ref Expression
fimacnvdisj ((𝐹:𝐴𝐵 ∧ (𝐵𝐶) = ∅) → (𝐹𝐶) = ∅)

Proof of Theorem fimacnvdisj
StepHypRef Expression
1 df-rn 5591 . . . 4 ran 𝐹 = dom 𝐹
2 frn 6591 . . . . 5 (𝐹:𝐴𝐵 → ran 𝐹𝐵)
32adantr 480 . . . 4 ((𝐹:𝐴𝐵 ∧ (𝐵𝐶) = ∅) → ran 𝐹𝐵)
41, 3eqsstrrid 3966 . . 3 ((𝐹:𝐴𝐵 ∧ (𝐵𝐶) = ∅) → dom 𝐹𝐵)
5 ssdisj 4390 . . 3 ((dom 𝐹𝐵 ∧ (𝐵𝐶) = ∅) → (dom 𝐹𝐶) = ∅)
64, 5sylancom 587 . 2 ((𝐹:𝐴𝐵 ∧ (𝐵𝐶) = ∅) → (dom 𝐹𝐶) = ∅)
7 imadisj 5977 . 2 ((𝐹𝐶) = ∅ ↔ (dom 𝐹𝐶) = ∅)
86, 7sylibr 233 1 ((𝐹:𝐴𝐵 ∧ (𝐵𝐶) = ∅) → (𝐹𝐶) = ∅)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 395   = wceq 1539  cin 3882  wss 3883  c0 4253  ccnv 5579  dom cdm 5580  ran crn 5581  cima 5583  wf 6414
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1799  ax-4 1813  ax-5 1914  ax-6 1972  ax-7 2012  ax-8 2110  ax-9 2118  ax-10 2139  ax-11 2156  ax-12 2173  ax-ext 2709  ax-sep 5218  ax-nul 5225  ax-pr 5347
This theorem depends on definitions:  df-bi 206  df-an 396  df-or 844  df-3an 1087  df-tru 1542  df-fal 1552  df-ex 1784  df-nf 1788  df-sb 2069  df-clab 2716  df-cleq 2730  df-clel 2817  df-ral 3068  df-rex 3069  df-rab 3072  df-v 3424  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4254  df-if 4457  df-sn 4559  df-pr 4561  df-op 4565  df-br 5071  df-opab 5133  df-xp 5586  df-cnv 5588  df-dm 5590  df-rn 5591  df-res 5592  df-ima 5593  df-f 6422
This theorem is referenced by:  vdwmc2  16608  gsumval3a  19419  psrbag0  21180  mbfconstlem  24696  itg1val2  24753  ofpreima2  30905
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