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Theorem oppfvallem 49765
Description: Lemma for oppfval 49766. (Contributed by Zhi Wang, 13-Nov-2025.)
Assertion
Ref Expression
oppfvallem (𝐹(𝐶 Func 𝐷)𝐺 → (Rel 𝐺 ∧ Rel dom 𝐺))

Proof of Theorem oppfvallem
StepHypRef Expression
1 eqid 2765 . . . 4 (Base‘𝐶) = (Base‘𝐶)
2 id 23 . . . 4 (𝐹(𝐶 Func 𝐷)𝐺𝐹(𝐶 Func 𝐷)𝐺)
31, 2funcfn2 17914 . . 3 (𝐹(𝐶 Func 𝐷)𝐺𝐺 Fn ((Base‘𝐶) × (Base‘𝐶)))
4 fnrel 6627 . . 3 (𝐺 Fn ((Base‘𝐶) × (Base‘𝐶)) → Rel 𝐺)
53, 4syl 18 . 2 (𝐹(𝐶 Func 𝐷)𝐺 → Rel 𝐺)
6 relxp 5669 . . 3 Rel ((Base‘𝐶) × (Base‘𝐶))
73fndmd 6630 . . . 4 (𝐹(𝐶 Func 𝐷)𝐺 → dom 𝐺 = ((Base‘𝐶) × (Base‘𝐶)))
87releqd 5755 . . 3 (𝐹(𝐶 Func 𝐷)𝐺 → (Rel dom 𝐺 ↔ Rel ((Base‘𝐶) × (Base‘𝐶))))
96, 8mpbiri 261 . 2 (𝐹(𝐶 Func 𝐷)𝐺 → Rel dom 𝐺)
105, 9jca 520 1 (𝐹(𝐶 Func 𝐷)𝐺 → (Rel 𝐺 ∧ Rel dom 𝐺))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 400   class class class wbr 5104   × cxp 5649  dom cdm 5651  Rel wrel 5656   Fn wfn 6520  cfv 6525  (class class class)co 7400  Basecbs 17257   Func cfunc 17899
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1818  ax-4 1832  ax-5 1933  ax-6 1990  ax-7 2031  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2737  ax-rep 5231  ax-sep 5250  ax-nul 5260  ax-pow 5326  ax-pr 5394  ax-un 7722
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1566  df-fal 1576  df-ex 1803  df-nf 1807  df-sb 2094  df-mo 2569  df-eu 2599  df-clab 2744  df-cleq 2757  df-clel 2840  df-nfc 2914  df-ne 2961  df-ral 3080  df-rex 3090  df-rab 3418  df-v 3459  df-sbc 3748  df-csb 3856  df-dif 3910  df-un 3912  df-in 3914  df-ss 3924  df-nul 4289  df-if 4484  df-pw 4560  df-sn 4586  df-pr 4588  df-op 4592  df-uni 4868  df-iun 4953  df-br 5105  df-opab 5167  df-mpt 5186  df-id 5546  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-rn 5662  df-iota 6481  df-fun 6527  df-fn 6528  df-f 6529  df-fv 6533  df-ov 7403  df-oprab 7404  df-mpo 7405  df-map 8814  df-ixp 8884  df-func 17903
This theorem is referenced by:  oppfval  49766
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