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| Mirrors > Home > MPE Home > Th. List > Mathboxes > termfucterm | Structured version Visualization version GIF version | ||
| Description: All functors between two terminal categories are isomorphisms. (Contributed by Zhi Wang, 17-Nov-2025.) |
| Ref | Expression |
|---|---|
| termfucterm.c | ⊢ 𝐶 = (CatCat‘𝑈) |
| termfucterm.b | ⊢ 𝐵 = (Base‘𝐶) |
| termfucterm.i | ⊢ 𝐼 = (Iso‘𝐶) |
| termfucterm.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| termfucterm.xt | ⊢ (𝜑 → 𝑋 ∈ TermCat) |
| termfucterm.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| termfucterm.yt | ⊢ (𝜑 → 𝑌 ∈ TermCat) |
| Ref | Expression |
|---|---|
| termfucterm | ⊢ (𝜑 → (𝑋 Func 𝑌) = (𝑋𝐼𝑌)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | termfucterm.yt | . . . . . . 7 ⊢ (𝜑 → 𝑌 ∈ TermCat) | |
| 2 | termfucterm.c | . . . . . . . 8 ⊢ 𝐶 = (CatCat‘𝑈) | |
| 3 | termfucterm.b | . . . . . . . 8 ⊢ 𝐵 = (Base‘𝐶) | |
| 4 | termfucterm.x | . . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 5 | termfucterm.y | . . . . . . . 8 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 6 | termfucterm.xt | . . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ TermCat) | |
| 7 | 2, 3, 4, 5, 6 | termcciso 50322 | . . . . . . 7 ⊢ (𝜑 → (𝑌 ∈ TermCat ↔ 𝑋( ≃𝑐 ‘𝐶)𝑌)) |
| 8 | 1, 7 | mpbid 235 | . . . . . 6 ⊢ (𝜑 → 𝑋( ≃𝑐 ‘𝐶)𝑌) |
| 9 | termfucterm.i | . . . . . . 7 ⊢ 𝐼 = (Iso‘𝐶) | |
| 10 | cicrcl2 49849 | . . . . . . . 8 ⊢ (𝑋( ≃𝑐 ‘𝐶)𝑌 → 𝐶 ∈ Cat) | |
| 11 | 8, 10 | syl 18 | . . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ Cat) |
| 12 | 9, 3, 11, 4, 5 | cic 17860 | . . . . . 6 ⊢ (𝜑 → (𝑋( ≃𝑐 ‘𝐶)𝑌 ↔ ∃𝑔 𝑔 ∈ (𝑋𝐼𝑌))) |
| 13 | 8, 12 | mpbid 235 | . . . . 5 ⊢ (𝜑 → ∃𝑔 𝑔 ∈ (𝑋𝐼𝑌)) |
| 14 | 13 | adantr 485 | . . . 4 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) → ∃𝑔 𝑔 ∈ (𝑋𝐼𝑌)) |
| 15 | eqid 2763 | . . . . . . . 8 ⊢ (𝑋 FuncCat 𝑌) = (𝑋 FuncCat 𝑌) | |
| 16 | 6 | termccd 50285 | . . . . . . . 8 ⊢ (𝜑 → 𝑋 ∈ Cat) |
| 17 | 15, 16, 1 | fucterm 50348 | . . . . . . 7 ⊢ (𝜑 → (𝑋 FuncCat 𝑌) ∈ TermCat) |
| 18 | 17 | ad2antrr 738 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → (𝑋 FuncCat 𝑌) ∈ TermCat) |
| 19 | 15 | fucbas 18024 | . . . . . 6 ⊢ (𝑋 Func 𝑌) = (Base‘(𝑋 FuncCat 𝑌)) |
| 20 | simplr 780 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋 Func 𝑌)) | |
| 21 | fullfunc 17969 | . . . . . . 7 ⊢ (𝑋 Full 𝑌) ⊆ (𝑋 Func 𝑌) | |
| 22 | eqid 2763 | . . . . . . . . . 10 ⊢ (Base‘𝑋) = (Base‘𝑋) | |
| 23 | eqid 2763 | . . . . . . . . . 10 ⊢ (Base‘𝑌) = (Base‘𝑌) | |
| 24 | simpr 489 | . . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑔 ∈ (𝑋𝐼𝑌)) | |
| 25 | 2, 22, 23, 9, 24 | catcisoi 50206 | . . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → (𝑔 ∈ ((𝑋 Full 𝑌) ∩ (𝑋 Faith 𝑌)) ∧ (1st ‘𝑔):(Base‘𝑋)–1-1-onto→(Base‘𝑌))) |
| 26 | 25 | simpld 499 | . . . . . . . 8 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑔 ∈ ((𝑋 Full 𝑌) ∩ (𝑋 Faith 𝑌))) |
| 27 | 26 | elin1d 4157 | . . . . . . 7 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑔 ∈ (𝑋 Full 𝑌)) |
| 28 | 21, 27 | sselid 3935 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑔 ∈ (𝑋 Func 𝑌)) |
| 29 | 18, 19, 20, 28 | termcbasmo 50289 | . . . . 5 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑓 = 𝑔) |
| 30 | 29, 24 | eqeltrd 2863 | . . . 4 ⊢ (((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) ∧ 𝑔 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋𝐼𝑌)) |
| 31 | 14, 30 | exlimddv 1965 | . . 3 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋 Func 𝑌)) → 𝑓 ∈ (𝑋𝐼𝑌)) |
| 32 | simpr 489 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋𝐼𝑌)) | |
| 33 | 2, 22, 23, 9, 32 | catcisoi 50206 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → (𝑓 ∈ ((𝑋 Full 𝑌) ∩ (𝑋 Faith 𝑌)) ∧ (1st ‘𝑓):(Base‘𝑋)–1-1-onto→(Base‘𝑌))) |
| 34 | 33 | simpld 499 | . . . . 5 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ ((𝑋 Full 𝑌) ∩ (𝑋 Faith 𝑌))) |
| 35 | 34 | elin1d 4157 | . . . 4 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋 Full 𝑌)) |
| 36 | 21, 35 | sselid 3935 | . . 3 ⊢ ((𝜑 ∧ 𝑓 ∈ (𝑋𝐼𝑌)) → 𝑓 ∈ (𝑋 Func 𝑌)) |
| 37 | 31, 36 | impbida 812 | . 2 ⊢ (𝜑 → (𝑓 ∈ (𝑋 Func 𝑌) ↔ 𝑓 ∈ (𝑋𝐼𝑌))) |
| 38 | 37 | eqrdv 2761 | 1 ⊢ (𝜑 → (𝑋 Func 𝑌) = (𝑋𝐼𝑌)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 400 = wceq 1570 ∃wex 1809 ∈ wcel 2143 ∩ cin 3904 class class class wbr 5109 –1-1-onto→wf1o 6535 ‘cfv 6536 (class class class)co 7410 1st c1st 7980 Basecbs 17273 Catccat 17724 Isociso 17807 ≃𝑐 ccic 17856 Func cfunc 17915 Full cful 17965 Faith cfth 17966 FuncCat cfuc 18006 CatCatccatc 18159 TermCatctermc 50278 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5238 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-cnex 11160 ax-resscn 11161 ax-1cn 11162 ax-icn 11163 ax-addcl 11164 ax-addrcl 11165 ax-mulcl 11166 ax-mulrcl 11167 ax-mulcom 11168 ax-addass 11169 ax-mulass 11170 ax-distr 11171 ax-i2m1 11172 ax-1ne0 11173 ax-1rid 11174 ax-rnegex 11175 ax-rrecex 11176 ax-cnre 11177 ax-pre-lttri 11178 ax-pre-lttrn 11179 ax-pre-ltadd 11180 ax-pre-mulgt0 11181 |
| This proof depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-tp 4594 df-op 4596 df-uni 4873 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7859 df-1st 7982 df-2nd 7983 df-supp 8153 df-tpos 8218 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-1o 8449 df-er 8690 df-map 8822 df-ixp 8892 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-pnf 11249 df-mnf 11250 df-xr 11251 df-ltxr 11252 df-le 11253 df-sub 11447 df-neg 11448 df-nn 12238 df-2 12307 df-3 12308 df-4 12309 df-5 12310 df-6 12311 df-7 12312 df-8 12313 df-9 12314 df-n0 12509 df-z 12596 df-dec 12716 df-uz 12867 df-fz 13540 df-struct 17211 df-sets 17228 df-slot 17246 df-ndx 17258 df-base 17274 df-hom 17338 df-cco 17339 df-cat 17728 df-cid 17729 df-homf 17730 df-comf 17731 df-oppc 17772 df-sect 17808 df-inv 17809 df-iso 17810 df-cic 17857 df-func 17919 df-idfu 17920 df-cofu 17921 df-full 17967 df-fth 17968 df-nat 18007 df-fuc 18008 df-inito 18045 df-termo 18046 df-catc 18160 df-thinc 50224 df-termc 50279 |
| This theorem is used by: (None) |
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