Theorem oppfvallem 49896

Description: Lemma for oppfval 49897. (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

Step	Hyp	Ref	Expression
1		eqid 2763	. . . 4 ⊢ (Base‘𝐶) = (Base‘𝐶)
2		id 23	. . . 4 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → 𝐹(𝐶 Func 𝐷)𝐺)
3	1, 2	funcfn2 17927	. . 3 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → 𝐺 Fn ((Base‘𝐶) × (Base‘𝐶)))
4		fnrel 6639	. . 3 ⊢ (𝐺 Fn ((Base‘𝐶) × (Base‘𝐶)) → Rel 𝐺)
5	3, 4	syl 18	. 2 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → Rel 𝐺)
6		relxp 5681	. . 3 ⊢ Rel ((Base‘𝐶) × (Base‘𝐶))
7	3	fndmd 6642	. . . 4 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → dom 𝐺 = ((Base‘𝐶) × (Base‘𝐶)))
8	7	releqd 5767	. . 3 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → (Rel dom 𝐺 ↔ Rel ((Base‘𝐶) × (Base‘𝐶))))
9	6, 8	mpbiri 261	. 2 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → Rel dom 𝐺)
10	5, 9	jca 520	1 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → (Rel 𝐺 ∧ Rel dom 𝐺))

Syntax hints:   → wi 4   ∧ wa 400   class class class wbr 5110   × cxp 5661  dom cdm 5663  Rel wrel 5668   Fn wfn 6533  ‘cfv 6538  (class class class)co 7412  Basecbs 17270   Func cfunc 17912

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1825  ax-4 1839  ax-5 1940  ax-6 1997  ax-7 2038  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-rep 5239  ax-sep 5258  ax-nul 5270  ax-pow 5338  ax-pr 5406  ax-un 7734

This theorem depends on definitions:  df-bi 210  df-an 401  df-or 861  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1810  df-nf 1814  df-sb 2097  df-mo 2567  df-eu 2597  df-clab 2742  df-cleq 2755  df-clel 2838  df-nfc 2912  df-ne 2959  df-ral 3080  df-rex 3090  df-rab 3417  df-v 3457  df-sbc 3746  df-csb 3855  df-dif 3909  df-un 3911  df-in 3913  df-ss 3923  df-nul 4288  df-if 4489  df-pw 4565  df-sn 4591  df-pr 4593  df-op 4597  df-uni 4874  df-iun 4959  df-br 5111  df-opab 5175  df-mpt 5194  df-id 5558  df-xp 5669  df-rel 5670  df-cnv 5671  df-co 5672  df-dm 5673  df-rn 5674  df-iota 6494  df-fun 6540  df-fn 6541  df-f 6542  df-fv 6546  df-ov 7415  df-oprab 7416  df-mpo 7417  df-map 8827  df-ixp 8897  df-func 17916

This theorem is referenced by:  oppfval  49897