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Theorem ndmovrcl 7538
Description: Reverse closure law, when an operation's domain doesn't contain the empty set. (Contributed by NM, 3-Feb-1996.)
Hypotheses
Ref Expression
ndmov.1 dom 𝐹 = (𝑆 × 𝑆)
ndmovrcl.3 ¬ ∅ ∈ 𝑆
Assertion
Ref Expression
ndmovrcl ((𝐴𝐹𝐵) ∈ 𝑆 → (𝐴𝑆𝐵𝑆))

Proof of Theorem ndmovrcl
StepHypRef Expression
1 ndmovrcl.3 . . 3 ¬ ∅ ∈ 𝑆
2 ndmov.1 . . . . 5 dom 𝐹 = (𝑆 × 𝑆)
32ndmov 7536 . . . 4 (¬ (𝐴𝑆𝐵𝑆) → (𝐴𝐹𝐵) = ∅)
43eleq1d 2818 . . 3 (¬ (𝐴𝑆𝐵𝑆) → ((𝐴𝐹𝐵) ∈ 𝑆 ↔ ∅ ∈ 𝑆))
51, 4mtbiri 327 . 2 (¬ (𝐴𝑆𝐵𝑆) → ¬ (𝐴𝐹𝐵) ∈ 𝑆)
65con4i 114 1 ((𝐴𝐹𝐵) ∈ 𝑆 → (𝐴𝑆𝐵𝑆))
Colors of variables: wff setvar class
Syntax hints:  ¬ wn 3  wi 4  wa 395   = wceq 1541  wcel 2113  c0 4282   × cxp 5617  dom cdm 5619  (class class class)co 7352
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-ext 2705  ax-sep 5236  ax-nul 5246  ax-pr 5372
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1544  df-fal 1554  df-ex 1781  df-sb 2068  df-mo 2537  df-eu 2566  df-clab 2712  df-cleq 2725  df-clel 2808  df-ne 2930  df-ral 3049  df-rex 3058  df-rab 3397  df-v 3439  df-dif 3901  df-un 3903  df-ss 3915  df-nul 4283  df-if 4475  df-sn 4576  df-pr 4578  df-op 4582  df-uni 4859  df-br 5094  df-opab 5156  df-xp 5625  df-dm 5629  df-iota 6442  df-fv 6494  df-ov 7355
This theorem is referenced by:  ndmovass  7540  ndmovdistr  7541  ndmovord  7542  ndmovordi  7543  caovmo  7589  brecop2  8741  eceqoveq  8752  addcanpi  10797  mulcanpi  10798  ordpipq  10840  recmulnq  10862  recclnq  10864  ltexnq  10873  nsmallnq  10875  ltbtwnnq  10876  prlem934  10931  ltaddpr  10932  ltaddpr2  10933  ltexprlem2  10935  ltexprlem3  10936  ltexprlem4  10937  ltexprlem6  10939  ltexprlem7  10940  addcanpr  10944  prlem936  10945  mappsrpr  11006
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