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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 17829 | . . . 4 ⊢ Rel (𝐶 Func 𝐷) | |
| 2 | 1 | brrelex12i 5686 | . . 3 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → (𝐹 ∈ V ∧ 𝐺 ∈ V)) |
| 3 | oppfvalg 49601 | . . 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 49610 | . . 3 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → (Rel 𝐺 ∧ Rel dom 𝐺)) | |
| 6 | 5 | iftrued 4474 | . 2 ⊢ (𝐹(𝐶 Func 𝐷)𝐺 → if((Rel 𝐺 ∧ Rel dom 𝐺), 〈𝐹, tpos 𝐺〉, ∅) = 〈𝐹, tpos 𝐺〉) |
| 7 | 4, 6 | eqtrd 2771 | 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 1542 ∈ wcel 2114 Vcvv 3429 ∅c0 4273 ifcif 4466 〈cop 4573 class class class wbr 5085 dom cdm 5631 Rel wrel 5636 (class class class)co 7367 tpos ctpos 8175 Func cfunc 17821 oppFunc coppf 49597 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-id 5526 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-fv 6506 df-ov 7370 df-oprab 7371 df-mpo 7372 df-1st 7942 df-2nd 7943 df-tpos 8176 df-map 8775 df-ixp 8846 df-func 17825 df-oppf 49598 |
| This theorem is referenced by: oppfval2 49612 oppfval3 49613 oppfoppc 49616 ranval 50095 termolmd 50145 |
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