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| Mirrors > Home > MPE Home > Th. List > Mathboxes > oppfval | Structured version Visualization version GIF version | ||
| Description: Value of the opposite functor. (Contributed by Zhi Wang, 4-Nov-2025.) |
| Ref | Expression |
|---|---|
| oppfval | ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → (𝐹 oppFunc 𝐺) = 〈𝐹, tpos 𝐺〉) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | relfunc 17830 | . . . 4 ⊢ Rel (𝐶 Func 𝐷) | |
| 2 | 1 | brrelex12i 5695 | . . 3 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → (𝐹 ∈ V ∧ 𝐺 ∈ V)) |
| 3 | oppfvalg 49105 | . . 3 ⊢ ((𝐹 ∈ V ∧ 𝐺 ∈ V) → (𝐹 oppFunc 𝐺) = if((Rel 𝐺 ∧ Rel dom 𝐺), 〈𝐹, tpos 𝐺〉, ∅)) | |
| 4 | 2, 3 | syl 17 | . 2 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → (𝐹 oppFunc 𝐺) = if((Rel 𝐺 ∧ Rel dom 𝐺), 〈𝐹, tpos 𝐺〉, ∅)) |
| 5 | oppfvallem 49114 | . . 3 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → (Rel 𝐺 ∧ Rel dom 𝐺)) | |
| 6 | 5 | iftrued 4498 | . 2 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → if((Rel 𝐺 ∧ Rel dom 𝐺), 〈𝐹, tpos 𝐺〉, ∅) = 〈𝐹, tpos 𝐺〉) |
| 7 | 4, 6 | eqtrd 2765 | 1 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → (𝐹 oppFunc 𝐺) = 〈𝐹, tpos 𝐺〉) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∈ wcel 2109 Vcvv 3450 ∅c0 4298 ifcif 4490 〈cop 4597 class class class wbr 5109 dom cdm 5640 Rel wrel 5645 (class class class)co 7389 tpos ctpos 8206 Func cfunc 17822 oppFunc coppf 49101 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2702 ax-rep 5236 ax-sep 5253 ax-nul 5263 ax-pow 5322 ax-pr 5389 ax-un 7713 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2534 df-eu 2563 df-clab 2709 df-cleq 2722 df-clel 2804 df-nfc 2879 df-ne 2927 df-ral 3046 df-rex 3055 df-rab 3409 df-v 3452 df-sbc 3756 df-csb 3865 df-dif 3919 df-un 3921 df-in 3923 df-ss 3933 df-nul 4299 df-if 4491 df-pw 4567 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5110 df-opab 5172 df-mpt 5191 df-id 5535 df-xp 5646 df-rel 5647 df-cnv 5648 df-co 5649 df-dm 5650 df-rn 5651 df-res 5652 df-ima 5653 df-iota 6466 df-fun 6515 df-fn 6516 df-f 6517 df-fv 6521 df-ov 7392 df-oprab 7393 df-mpo 7394 df-1st 7970 df-2nd 7971 df-tpos 8207 df-map 8803 df-ixp 8873 df-func 17826 df-oppf 49102 |
| This theorem is referenced by: oppfval2 49116 oppfval3 49117 oppfoppc 49120 ranval 49599 termolmd 49649 |
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