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Theorem oppfvallem 49832
Description: Lemma for oppfval 49833. (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 2769 . . . 4 (Base‘𝐶) = (Base‘𝐶)
2 id 23 . . . 4 (𝐹(𝐶 Func 𝐷)𝐺𝐹(𝐶 Func 𝐷)𝐺)
31, 2funcfn2 17926 . . 3 (𝐹(𝐶 Func 𝐷)𝐺𝐺 Fn ((Base‘𝐶) × (Base‘𝐶)))
4 fnrel 6638 . . 3 (𝐺 Fn ((Base‘𝐶) × (Base‘𝐶)) → Rel 𝐺)
53, 4syl 18 . 2 (𝐹(𝐶 Func 𝐷)𝐺 → Rel 𝐺)
6 relxp 5680 . . 3 Rel ((Base‘𝐶) × (Base‘𝐶))
73fndmd 6641 . . . 4 (𝐹(𝐶 Func 𝐷)𝐺 → dom 𝐺 = ((Base‘𝐶) × (Base‘𝐶)))
87releqd 5766 . . 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 5113   × cxp 5660  dom cdm 5662  Rel wrel 5667   Fn wfn 6532  cfv 6537  (class class class)co 7411  Basecbs 17269   Func cfunc 17911
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1822  ax-4 1836  ax-5 1937  ax-6 1994  ax-7 2035  ax-8 2151  ax-9 2159  ax-10 2182  ax-11 2198  ax-12 2219  ax-ext 2741  ax-rep 5242  ax-sep 5261  ax-nul 5271  ax-pow 5337  ax-pr 5405  ax-un 7733
This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1103  df-tru 1570  df-fal 1580  df-ex 1807  df-nf 1811  df-sb 2098  df-mo 2573  df-eu 2603  df-clab 2748  df-cleq 2761  df-clel 2844  df-nfc 2918  df-ne 2965  df-ral 3086  df-rex 3096  df-rab 3424  df-v 3465  df-sbc 3754  df-csb 3862  df-dif 3916  df-un 3918  df-in 3920  df-ss 3930  df-nul 4295  df-if 4493  df-pw 4569  df-sn 4595  df-pr 4597  df-op 4601  df-uni 4877  df-iun 4962  df-br 5114  df-opab 5178  df-mpt 5197  df-id 5557  df-xp 5668  df-rel 5669  df-cnv 5670  df-co 5671  df-dm 5672  df-rn 5673  df-iota 6493  df-fun 6539  df-fn 6540  df-f 6541  df-fv 6545  df-ov 7414  df-oprab 7415  df-mpo 7416  df-map 8826  df-ixp 8896  df-func 17915
This theorem is referenced by:  oppfval  49833
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