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| Mirrors > Home > MPE Home > Th. List > Mathboxes > funcoppc5 | Structured version Visualization version GIF version | ||
| Description: A functor on opposite categories yields a functor on the original categories. (Contributed by Zhi Wang, 14-Nov-2025.) |
| Ref | Expression |
|---|---|
| funcoppc2.o | ⊢ 𝑂 = (oppCat‘𝐶) |
| funcoppc2.p | ⊢ 𝑃 = (oppCat‘𝐷) |
| funcoppc2.c | ⊢ (𝜑 → 𝐶 ∈ 𝑉) |
| funcoppc2.d | ⊢ (𝜑 → 𝐷 ∈ 𝑊) |
| funcoppc5.f | ⊢ (𝜑 → ( oppFunc ‘𝐹) ∈ (𝑂 Func 𝑃)) |
| Ref | Expression |
|---|---|
| funcoppc5 | ⊢ (𝜑 → 𝐹 ∈ (𝐶 Func 𝐷)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | funcoppc5.f | . . . 4 ⊢ (𝜑 → ( oppFunc ‘𝐹) ∈ (𝑂 Func 𝑃)) | |
| 2 | relfunc 18037 | . . . 4 ⊢ Rel (𝑂 Func 𝑃) | |
| 3 | eqid 2760 | . . . 4 ⊢ ( oppFunc ‘𝐹) = ( oppFunc ‘𝐹) | |
| 4 | 1, 2, 3 | oppfrcl 50236 | . . 3 ⊢ (𝜑 → 𝐹 ∈ (V × V)) |
| 5 | 1st2nd2 8040 | . . 3 ⊢ (𝐹 ∈ (V × V) → 𝐹 = 〈(1st ‘𝐹), (2nd ‘𝐹)〉) | |
| 6 | 4, 5 | syl 18 | . 2 ⊢ (𝜑 → 𝐹 = 〈(1st ‘𝐹), (2nd ‘𝐹)〉) |
| 7 | funcoppc2.o | . . . 4 ⊢ 𝑂 = (oppCat‘𝐶) | |
| 8 | funcoppc2.p | . . . 4 ⊢ 𝑃 = (oppCat‘𝐷) | |
| 9 | funcoppc2.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ 𝑉) | |
| 10 | funcoppc2.d | . . . 4 ⊢ (𝜑 → 𝐷 ∈ 𝑊) | |
| 11 | 6 | fveq2d 6889 | . . . . . 6 ⊢ (𝜑 → ( oppFunc ‘𝐹) = ( oppFunc ‘〈(1st ‘𝐹), (2nd ‘𝐹)〉)) |
| 12 | df-ov 7423 | . . . . . 6 ⊢ ((1st ‘𝐹) oppFunc (2nd ‘𝐹)) = ( oppFunc ‘〈(1st ‘𝐹), (2nd ‘𝐹)〉) | |
| 13 | 11, 12 | eqtr4di 2813 | . . . . 5 ⊢ (𝜑 → ( oppFunc ‘𝐹) = ((1st ‘𝐹) oppFunc (2nd ‘𝐹))) |
| 14 | 13, 1 | eqeltrrd 2861 | . . . 4 ⊢ (𝜑 → ((1st ‘𝐹) oppFunc (2nd ‘𝐹)) ∈ (𝑂 Func 𝑃)) |
| 15 | 7, 8, 9, 10, 14 | funcoppc4 50252 | . . 3 ⊢ (𝜑 → (1st ‘𝐹)(𝐶 Func 𝐷)(2nd ‘𝐹)) |
| 16 | df-br 5103 | . . 3 ⊢ ((1st ‘𝐹)(𝐶 Func 𝐷)(2nd ‘𝐹) ↔ 〈(1st ‘𝐹), (2nd ‘𝐹)〉 ∈ (𝐶 Func 𝐷)) | |
| 17 | 15, 16 | sylib 221 | . 2 ⊢ (𝜑 → 〈(1st ‘𝐹), (2nd ‘𝐹)〉 ∈ (𝐶 Func 𝐷)) |
| 18 | 6, 17 | eqeltrd 2860 | 1 ⊢ (𝜑 → 𝐹 ∈ (𝐶 Func 𝐷)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2144 Vcvv 3450 〈cop 4589 class class class wbr 5102 × cxp 5648 ‘cfv 6538 (class class class)co 7420 1st c1st 7999 2nd c2nd 8000 oppCatcoppc 17885 Func cfunc 18029 oppFunc coppf 50230 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-cnex 11256 ax-resscn 11257 ax-1cn 11258 ax-icn 11259 ax-addcl 11260 ax-addrcl 11261 ax-mulcl 11262 ax-mulrcl 11263 ax-mulcom 11264 ax-addass 11265 ax-mulass 11266 ax-distr 11267 ax-i2m1 11268 ax-1ne0 11269 ax-1rid 11270 ax-rnegex 11271 ax-rrecex 11272 ax-cnre 11273 ax-pre-lttri 11274 ax-pre-lttrn 11275 ax-pre-ltadd 11276 ax-pre-mulgt0 11277 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7377 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-tpos 8243 df-frecs 8299 df-wrecs 8330 df-recs 8379 df-rdg 8418 df-er 8717 df-map 8849 df-ixp 8926 df-en 8974 df-dom 8975 df-sdom 8976 df-pnf 11345 df-mnf 11346 df-xr 11347 df-ltxr 11348 df-le 11349 df-sub 11543 df-neg 11544 df-nn 12336 df-2 12405 df-3 12406 df-4 12407 df-5 12408 df-6 12409 df-7 12410 df-8 12411 df-9 12412 df-n0 12607 df-z 12694 df-dec 12815 df-sets 17342 df-slot 17360 df-ndx 17372 df-base 17388 df-hom 17452 df-cco 17453 df-cat 17842 df-cid 17843 df-homf 17844 df-comf 17845 df-oppc 17886 df-func 18033 df-oppf 50231 |
| This theorem is used by: oppfuprcl 50312 natoppfb 50339 lmddu 50775 cmddu 50776 |
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