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Theorem fovrn 7314
Description: An operation's value belongs to its codomain. (Contributed by NM, 27-Aug-2006.)
Assertion
Ref Expression
fovrn ((𝐹:(𝑅 × 𝑆)⟶𝐶𝐴𝑅𝐵𝑆) → (𝐴𝐹𝐵) ∈ 𝐶)

Proof of Theorem fovrn
StepHypRef Expression
1 opelxpi 5561 . . 3 ((𝐴𝑅𝐵𝑆) → ⟨𝐴, 𝐵⟩ ∈ (𝑅 × 𝑆))
2 df-ov 7153 . . . 4 (𝐴𝐹𝐵) = (𝐹‘⟨𝐴, 𝐵⟩)
3 ffvelrn 6840 . . . 4 ((𝐹:(𝑅 × 𝑆)⟶𝐶 ∧ ⟨𝐴, 𝐵⟩ ∈ (𝑅 × 𝑆)) → (𝐹‘⟨𝐴, 𝐵⟩) ∈ 𝐶)
42, 3eqeltrid 2856 . . 3 ((𝐹:(𝑅 × 𝑆)⟶𝐶 ∧ ⟨𝐴, 𝐵⟩ ∈ (𝑅 × 𝑆)) → (𝐴𝐹𝐵) ∈ 𝐶)
51, 4sylan2 595 . 2 ((𝐹:(𝑅 × 𝑆)⟶𝐶 ∧ (𝐴𝑅𝐵𝑆)) → (𝐴𝐹𝐵) ∈ 𝐶)
653impb 1112 1 ((𝐹:(𝑅 × 𝑆)⟶𝐶𝐴𝑅𝐵𝑆) → (𝐴𝐹𝐵) ∈ 𝐶)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 399  w3a 1084  wcel 2111  cop 4528   × cxp 5522  wf 6331  cfv 6335  (class class class)co 7150
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2113  ax-9 2121  ax-10 2142  ax-11 2158  ax-12 2175  ax-ext 2729  ax-sep 5169  ax-nul 5176  ax-pr 5298
This theorem depends on definitions:  df-bi 210  df-an 400  df-or 845  df-3an 1086  df-tru 1541  df-fal 1551  df-ex 1782  df-nf 1786  df-sb 2070  df-mo 2557  df-eu 2588  df-clab 2736  df-cleq 2750  df-clel 2830  df-nfc 2901  df-ral 3075  df-rex 3076  df-v 3411  df-sbc 3697  df-dif 3861  df-un 3863  df-in 3865  df-ss 3875  df-nul 4226  df-if 4421  df-sn 4523  df-pr 4525  df-op 4529  df-uni 4799  df-br 5033  df-opab 5095  df-id 5430  df-xp 5530  df-rel 5531  df-cnv 5532  df-co 5533  df-dm 5534  df-rn 5535  df-iota 6294  df-fun 6337  df-fn 6338  df-f 6339  df-fv 6343  df-ov 7153
This theorem is referenced by:  fovrnda  7315  fovrnd  7316  ovmpoelrn  7774  curry1f  7806  curry2f  7808  mapxpen  8705  axdc4lem  9915  axdc4uzlem  13400  imasmnd2  18014  grpsubcl  18246  imasgrp2  18281  imasring  19440  tsmsxplem1  22853  psmetcl  23009  xmetcl  23033  metcl  23034  blssm  23120  mbfi1fseqlem3  24417  mbfi1fseqlem4  24418  mbfi1fseqlem5  24419  grpocl  28382  grpodivcl  28421  vccl  28445  nvmcl  28528  cvmliftphtlem  32795  matunitlindflem1  35333  isbnd3  35502  clmgmOLD  35569  rngocl  35619  isdrngo2  35676
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