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| Mirrors > Home > MPE Home > Th. List > fthoppc | Structured version Visualization version GIF version | ||
| Description: The opposite functor of a faithful functor is also faithful. Proposition 3.43(c) in [Adamek] p. 39. (Contributed by Mario Carneiro, 27-Jan-2017.) |
| Ref | Expression |
|---|---|
| fulloppc.o | ⊢ 𝑂 = (oppCat‘𝐶) |
| fulloppc.p | ⊢ 𝑃 = (oppCat‘𝐷) |
| fthoppc.f | ⊢ (𝜑 → 𝐹(𝐶 Faith 𝐷)𝐺) |
| Ref | Expression |
|---|---|
| fthoppc | ⊢ (𝜑 → 𝐹(𝑂 Faith 𝑃)tpos 𝐺) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fulloppc.o | . . 3 ⊢ 𝑂 = (oppCat‘𝐶) | |
| 2 | fulloppc.p | . . 3 ⊢ 𝑃 = (oppCat‘𝐷) | |
| 3 | fthoppc.f | . . . 4 ⊢ (𝜑 → 𝐹(𝐶 Faith 𝐷)𝐺) | |
| 4 | fthfunc 18064 | . . . . 5 ⊢ (𝐶 Faith 𝐷) ⊆ (𝐶 Func 𝐷) | |
| 5 | 4 | ssbri 5150 | . . . 4 ⊢ (𝐹(𝐶 Faith 𝐷)𝐺 → 𝐹(𝐶 Func 𝐷)𝐺) |
| 6 | 3, 5 | syl 18 | . . 3 ⊢ (𝜑 → 𝐹(𝐶 Func 𝐷)𝐺) |
| 7 | 1, 2, 6 | funcoppc 18030 | . 2 ⊢ (𝜑 → 𝐹(𝑂 Func 𝑃)tpos 𝐺) |
| 8 | eqid 2761 | . . . . . 6 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 9 | eqid 2761 | . . . . . 6 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶) | |
| 10 | eqid 2761 | . . . . . 6 ⊢ (Hom ‘𝐷) = (Hom ‘𝐷) | |
| 11 | 3 | adantr 486 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → 𝐹(𝐶 Faith 𝐷)𝐺) |
| 12 | simprr 785 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → 𝑦 ∈ (Base‘𝐶)) | |
| 13 | simprl 783 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → 𝑥 ∈ (Base‘𝐶)) | |
| 14 | 8, 9, 10, 11, 12, 13 | fthf1 18074 | . . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → (𝑦𝐺𝑥):(𝑦(Hom ‘𝐶)𝑥)–1-1→((𝐹‘𝑦)(Hom ‘𝐷)(𝐹‘𝑥))) |
| 15 | df-f1 6536 | . . . . . 6 ⊢ ((𝑦𝐺𝑥):(𝑦(Hom ‘𝐶)𝑥)–1-1→((𝐹‘𝑦)(Hom ‘𝐷)(𝐹‘𝑥)) ↔ ((𝑦𝐺𝑥):(𝑦(Hom ‘𝐶)𝑥)⟶((𝐹‘𝑦)(Hom ‘𝐷)(𝐹‘𝑥)) ∧ Fun ◡(𝑦𝐺𝑥))) | |
| 16 | 15 | simprbi 503 | . . . . 5 ⊢ ((𝑦𝐺𝑥):(𝑦(Hom ‘𝐶)𝑥)–1-1→((𝐹‘𝑦)(Hom ‘𝐷)(𝐹‘𝑥)) → Fun ◡(𝑦𝐺𝑥)) |
| 17 | 14, 16 | syl 18 | . . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → Fun ◡(𝑦𝐺𝑥)) |
| 18 | ovtpos 8242 | . . . . . 6 ⊢ (𝑥tpos 𝐺𝑦) = (𝑦𝐺𝑥) | |
| 19 | 18 | cnveqi 5852 | . . . . 5 ⊢ ◡(𝑥tpos 𝐺𝑦) = ◡(𝑦𝐺𝑥) |
| 20 | 19 | funeqi 6552 | . . . 4 ⊢ (Fun ◡(𝑥tpos 𝐺𝑦) ↔ Fun ◡(𝑦𝐺𝑥)) |
| 21 | 17, 20 | sylibr 237 | . . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → Fun ◡(𝑥tpos 𝐺𝑦)) |
| 22 | 21 | ralrimivva 3206 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ (Base‘𝐶)∀𝑦 ∈ (Base‘𝐶)Fun ◡(𝑥tpos 𝐺𝑦)) |
| 23 | 1, 8 | oppcbas 17872 | . . 3 ⊢ (Base‘𝐶) = (Base‘𝑂) |
| 24 | 23 | isfth 18071 | . 2 ⊢ (𝐹(𝑂 Faith 𝑃)tpos 𝐺 ↔ (𝐹(𝑂 Func 𝑃)tpos 𝐺 ∧ ∀𝑥 ∈ (Base‘𝐶)∀𝑦 ∈ (Base‘𝐶)Fun ◡(𝑥tpos 𝐺𝑦))) |
| 25 | 7, 22, 24 | sylanbrc 595 | 1 ⊢ (𝜑 → 𝐹(𝑂 Faith 𝑃)tpos 𝐺) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∀wral 3077 class class class wbr 5103 ◡ccnv 5650 Fun wfun 6525 ⟶wf 6527 –1-1→wf1 6528 ‘cfv 6531 (class class class)co 7412 tpos ctpos 8226 Basecbs 17367 Hom chom 17419 oppCatcoppc 17865 Func cfunc 18009 Faith cfth 18060 |
| 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-oppc 17866 df-func 18013 df-fth 18062 |
| This theorem is used by: ffthoppc 18081 fthepi 18085 fthoppf 50216 |
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