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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 18004 | . . . . 5 ⊢ (𝐶 Faith 𝐷) ⊆ (𝐶 Func 𝐷) | |
| 5 | 4 | ssbri 5154 | . . . 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 17970 | . 2 ⊢ (𝜑 → 𝐹(𝑂 Func 𝑃)tpos 𝐺) |
| 8 | eqid 2762 | . . . . . 6 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 9 | eqid 2762 | . . . . . 6 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶) | |
| 10 | eqid 2762 | . . . . . 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 18014 | . . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ (Base‘𝐶) ∧ 𝑦 ∈ (Base‘𝐶))) → (𝑦𝐺𝑥):(𝑦(Hom ‘𝐶)𝑥)–1-1→((𝐹‘𝑦)(Hom ‘𝐷)(𝐹‘𝑥))) |
| 15 | df-f1 6542 | . . . . . 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 8243 | . . . . . 6 ⊢ (𝑥tpos 𝐺𝑦) = (𝑦𝐺𝑥) | |
| 19 | 18 | cnveqi 5858 | . . . . 5 ⊢ ◡(𝑥tpos 𝐺𝑦) = ◡(𝑦𝐺𝑥) |
| 20 | 19 | funeqi 6558 | . . . 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 3207 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ (Base‘𝐶)∀𝑦 ∈ (Base‘𝐶)Fun ◡(𝑥tpos 𝐺𝑦)) |
| 23 | 1, 8 | oppcbas 17812 | . . 3 ⊢ (Base‘𝐶) = (Base‘𝑂) |
| 24 | 23 | isfth 18011 | . 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 3078 class class class wbr 5107 ◡ccnv 5658 Fun wfun 6531 ⟶wf 6533 –1-1→wf1 6534 ‘cfv 6537 (class class class)co 7417 tpos ctpos 8227 Basecbs 17307 Hom chom 17359 oppCatcoppc 17805 Func cfunc 17949 Faith cfth 18000 |
| 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 2215 ax-ext 2734 ax-rep 5236 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7740 ax-cnex 11184 ax-resscn 11185 ax-1cn 11186 ax-icn 11187 ax-addcl 11188 ax-addrcl 11189 ax-mulcl 11190 ax-mulrcl 11191 ax-mulcom 11192 ax-addass 11193 ax-mulass 11194 ax-distr 11195 ax-i2m1 11196 ax-1ne0 11197 ax-1rid 11198 ax-rnegex 11199 ax-rrecex 11200 ax-cnre 11201 ax-pre-lttri 11202 ax-pre-lttrn 11203 ax-pre-ltadd 11204 ax-pre-mulgt0 11205 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7374 df-ov 7420 df-oprab 7421 df-mpo 7422 df-om 7867 df-1st 7990 df-2nd 7991 df-tpos 8228 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-er 8700 df-map 8832 df-ixp 8909 df-en 8957 df-dom 8958 df-sdom 8959 df-pnf 11273 df-mnf 11274 df-xr 11275 df-ltxr 11276 df-le 11277 df-sub 11471 df-neg 11472 df-nn 12262 df-2 12331 df-3 12332 df-4 12333 df-5 12334 df-6 12335 df-7 12336 df-8 12337 df-9 12338 df-n0 12533 df-z 12620 df-dec 12741 df-sets 17262 df-slot 17280 df-ndx 17292 df-base 17308 df-hom 17372 df-cco 17373 df-cat 17762 df-cid 17763 df-oppc 17806 df-func 17953 df-fth 18002 |
| This theorem is used by: ffthoppc 18021 fthepi 18025 fthoppf 50098 |
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