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| Mirrors > Home > MPE Home > Th. List > Mathboxes > oppff1o | Structured version Visualization version GIF version | ||
| Description: The operation generating opposite functors is bijective. (Contributed by Zhi Wang, 17-Nov-2025.) |
| Ref | Expression |
|---|---|
| oppff1.o | ⊢ 𝑂 = (oppCat‘𝐶) |
| oppff1.p | ⊢ 𝑃 = (oppCat‘𝐷) |
| oppff1o.c | ⊢ (𝜑 → 𝐶 ∈ 𝑉) |
| oppff1o.d | ⊢ (𝜑 → 𝐷 ∈ 𝑊) |
| Ref | Expression |
|---|---|
| oppff1o | ⊢ (𝜑 → ( oppFunc ↾ (𝐶 Func 𝐷)):(𝐶 Func 𝐷)–1-1-onto→(𝑂 Func 𝑃)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | oppff1.o | . . . 4 ⊢ 𝑂 = (oppCat‘𝐶) | |
| 2 | oppff1.p | . . . 4 ⊢ 𝑃 = (oppCat‘𝐷) | |
| 3 | 1, 2 | oppff1 50200 | . . 3 ⊢ ( oppFunc ↾ (𝐶 Func 𝐷)):(𝐶 Func 𝐷)–1-1→(𝑂 Func 𝑃) |
| 4 | 3 | a1i 11 | . 2 ⊢ (𝜑 → ( oppFunc ↾ (𝐶 Func 𝐷)):(𝐶 Func 𝐷)–1-1→(𝑂 Func 𝑃)) |
| 5 | f1f 6770 | . . . 4 ⊢ (( oppFunc ↾ (𝐶 Func 𝐷)):(𝐶 Func 𝐷)–1-1→(𝑂 Func 𝑃) → ( oppFunc ↾ (𝐶 Func 𝐷)):(𝐶 Func 𝐷)⟶(𝑂 Func 𝑃)) | |
| 6 | 4, 5 | syl 18 | . . 3 ⊢ (𝜑 → ( oppFunc ↾ (𝐶 Func 𝐷)):(𝐶 Func 𝐷)⟶(𝑂 Func 𝑃)) |
| 7 | fveq2 6877 | . . . . . 6 ⊢ (𝑔 = ( oppFunc ‘𝑓) → (( oppFunc ↾ (𝐶 Func 𝐷))‘𝑔) = (( oppFunc ↾ (𝐶 Func 𝐷))‘( oppFunc ‘𝑓))) | |
| 8 | 7 | eqeq2d 2772 | . . . . 5 ⊢ (𝑔 = ( oppFunc ‘𝑓) → (𝑓 = (( oppFunc ↾ (𝐶 Func 𝐷))‘𝑔) ↔ 𝑓 = (( oppFunc ↾ (𝐶 Func 𝐷))‘( oppFunc ‘𝑓)))) |
| 9 | oppff1o.c | . . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ 𝑉) | |
| 10 | 9 | adantr 486 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑂 Func 𝑃)) → 𝐶 ∈ 𝑉) |
| 11 | oppff1o.d | . . . . . . 7 ⊢ (𝜑 → 𝐷 ∈ 𝑊) | |
| 12 | 11 | adantr 486 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑂 Func 𝑃)) → 𝐷 ∈ 𝑊) |
| 13 | simpr 490 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑂 Func 𝑃)) → 𝑓 ∈ (𝑂 Func 𝑃)) | |
| 14 | 1, 2, 10, 12, 13 | 2oppffunc 50198 | . . . . 5 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑂 Func 𝑃)) → ( oppFunc ‘𝑓) ∈ (𝐶 Func 𝐷)) |
| 15 | 14 | fvresd 6897 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑂 Func 𝑃)) → (( oppFunc ↾ (𝐶 Func 𝐷))‘( oppFunc ‘𝑓)) = ( oppFunc ‘( oppFunc ‘𝑓))) |
| 16 | relfunc 18017 | . . . . . . 7 ⊢ Rel (𝐶 Func 𝐷) | |
| 17 | eqid 2761 | . . . . . . 7 ⊢ ( oppFunc ‘𝑓) = ( oppFunc ‘𝑓) | |
| 18 | 14, 16, 17 | 2oppf 50184 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑂 Func 𝑃)) → ( oppFunc ‘( oppFunc ‘𝑓)) = 𝑓) |
| 19 | 15, 18 | eqtr2d 2797 | . . . . 5 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑂 Func 𝑃)) → 𝑓 = (( oppFunc ↾ (𝐶 Func 𝐷))‘( oppFunc ‘𝑓))) |
| 20 | 8, 14, 19 | rspcedvdw 3580 | . . . 4 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑂 Func 𝑃)) → ∃𝑔 ∈ (𝐶 Func 𝐷)𝑓 = (( oppFunc ↾ (𝐶 Func 𝐷))‘𝑔)) |
| 21 | 20 | ralrimiva 3155 | . . 3 ⊢ (𝜑 → ∀𝑓 ∈ (𝑂 Func 𝑃)∃𝑔 ∈ (𝐶 Func 𝐷)𝑓 = (( oppFunc ↾ (𝐶 Func 𝐷))‘𝑔)) |
| 22 | dffo3 7094 | . . 3 ⊢ (( oppFunc ↾ (𝐶 Func 𝐷)):(𝐶 Func 𝐷)–onto→(𝑂 Func 𝑃) ↔ (( oppFunc ↾ (𝐶 Func 𝐷)):(𝐶 Func 𝐷)⟶(𝑂 Func 𝑃) ∧ ∀𝑓 ∈ (𝑂 Func 𝑃)∃𝑔 ∈ (𝐶 Func 𝐷)𝑓 = (( oppFunc ↾ (𝐶 Func 𝐷))‘𝑔))) | |
| 23 | 6, 21, 22 | sylanbrc 595 | . 2 ⊢ (𝜑 → ( oppFunc ↾ (𝐶 Func 𝐷)):(𝐶 Func 𝐷)–onto→(𝑂 Func 𝑃)) |
| 24 | df-f1o 6538 | . 2 ⊢ (( oppFunc ↾ (𝐶 Func 𝐷)):(𝐶 Func 𝐷)–1-1-onto→(𝑂 Func 𝑃) ↔ (( oppFunc ↾ (𝐶 Func 𝐷)):(𝐶 Func 𝐷)–1-1→(𝑂 Func 𝑃) ∧ ( oppFunc ↾ (𝐶 Func 𝐷)):(𝐶 Func 𝐷)–onto→(𝑂 Func 𝑃))) | |
| 25 | 4, 23, 24 | sylanbrc 595 | 1 ⊢ (𝜑 → ( oppFunc ↾ (𝐶 Func 𝐷)):(𝐶 Func 𝐷)–1-1-onto→(𝑂 Func 𝑃)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∀wral 3077 ∃wrex 3087 ↾ cres 5653 ⟶wf 6527 –1-1→wf1 6528 –onto→wfo 6529 –1-1-onto→wf1o 6530 ‘cfv 6531 (class class class)co 7412 oppCatcoppc 17865 Func cfunc 18009 oppFunc coppf 50174 |
| 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 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 ax-cnex 11237 ax-resscn 11238 ax-1cn 11239 ax-icn 11240 ax-addcl 11241 ax-addrcl 11242 ax-mulcl 11243 ax-mulrcl 11244 ax-mulcom 11245 ax-addass 11246 ax-mulass 11247 ax-distr 11248 ax-i2m1 11249 ax-1ne0 11250 ax-1rid 11251 ax-rnegex 11252 ax-rrecex 11253 ax-cnre 11254 ax-pre-lttri 11255 ax-pre-lttrn 11256 ax-pre-ltadd 11257 ax-pre-mulgt0 11258 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6297 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7867 df-1st 7990 df-2nd 7991 df-tpos 8227 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-er 8701 df-map 8833 df-ixp 8910 df-en 8958 df-dom 8959 df-sdom 8960 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11524 df-neg 11525 df-nn 12317 df-2 12386 df-3 12387 df-4 12388 df-5 12389 df-6 12390 df-7 12391 df-8 12392 df-9 12393 df-n0 12588 df-z 12675 df-dec 12796 df-sets 17322 df-slot 17340 df-ndx 17352 df-base 17368 df-hom 17432 df-cco 17433 df-cat 17822 df-cid 17823 df-homf 17824 df-comf 17825 df-oppc 17866 df-func 18013 df-oppf 50175 |
| This theorem is used by: fucoppc 50462 |
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