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| Mirrors > Home > MPE Home > Th. List > Mathboxes > oppfvallem | Structured version Visualization version GIF version | ||
| Description: Lemma for oppfval 49947. (Contributed by Zhi Wang, 13-Nov-2025.) |
| Ref | Expression |
|---|---|
| oppfvallem | ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → (Rel 𝐺 ∧ Rel dom 𝐺)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqid 2765 | . . . 4 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 2 | id 23 | . . . 4 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → 𝐹(𝐶 Func 𝐷)𝐺) | |
| 3 | 1, 2 | funcfn2 17943 | . . 3 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → 𝐺 Fn ((Base‘𝐶) × (Base‘𝐶))) |
| 4 | fnrel 6641 | . . 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 6644 | . . . 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 521 | 1 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → (Rel 𝐺 ∧ Rel dom 𝐺)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 class class class wbr 5111 × cxp 5661 dom cdm 5663 Rel wrel 5668 Fn wfn 6535 ‘cfv 6540 (class class class)co 7416 Basecbs 17286 Func cfunc 17928 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7738 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-id 5558 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-fv 6548 df-ov 7419 df-oprab 7420 df-mpo 7421 df-map 8828 df-ixp 8898 df-func 17932 |
| This theorem is used by: oppfval 49947 |
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