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| Mirrors > Home > MPE Home > Th. List > Mathboxes > termcterm2 | Structured version Visualization version GIF version | ||
| Description: A terminal object of the category of small categories is a terminal category. (Contributed by Zhi Wang, 18-Oct-2025.) (Proof shortened by Zhi Wang, 23-Oct-2025.) |
| Ref | Expression |
|---|---|
| termcterm.e | ⊢ 𝐸 = (CatCat‘𝑈) |
| termcterm2. | ⊢ (𝜑 → (𝑈 ∩ TermCat) ≠ ∅) |
| termcterm2.t | ⊢ (𝜑 → 𝐶 ∈ (TermO‘𝐸)) |
| Ref | Expression |
|---|---|
| termcterm2 | ⊢ (𝜑 → 𝐶 ∈ TermCat) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | termcterm2. | . . 3 ⊢ (𝜑 → (𝑈 ∩ TermCat) ≠ ∅) | |
| 2 | n0 4307 | . . 3 ⊢ ((𝑈 ∩ TermCat) ≠ ∅ ↔ ∃𝑑 𝑑 ∈ (𝑈 ∩ TermCat)) | |
| 3 | 1, 2 | sylib 221 | . 2 ⊢ (𝜑 → ∃𝑑 𝑑 ∈ (𝑈 ∩ TermCat)) |
| 4 | simpr 489 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ (𝑈 ∩ TermCat)) | |
| 5 | 4 | elin2d 4158 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ TermCat) |
| 6 | 5 | termcthind 50256 | . . . 4 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ ThinCat) |
| 7 | termcterm.e | . . . . 5 ⊢ 𝐸 = (CatCat‘𝑈) | |
| 8 | eqid 2763 | . . . . 5 ⊢ (Base‘𝐸) = (Base‘𝐸) | |
| 9 | termcterm2.t | . . . . . . . 8 ⊢ (𝜑 → 𝐶 ∈ (TermO‘𝐸)) | |
| 10 | 9 | adantr 485 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐶 ∈ (TermO‘𝐸)) |
| 11 | 8 | termoo2 50011 | . . . . . . 7 ⊢ (𝐶 ∈ (TermO‘𝐸) → 𝐶 ∈ (Base‘𝐸)) |
| 12 | 10, 11 | syl 18 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐶 ∈ (Base‘𝐸)) |
| 13 | 7, 8 | elbasfv 17270 | . . . . . 6 ⊢ (𝐶 ∈ (Base‘𝐸) → 𝑈 ∈ V) |
| 14 | 12, 13 | syl 18 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑈 ∈ V) |
| 15 | 4 | elin1d 4157 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ 𝑈) |
| 16 | 5 | termccd 50257 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ Cat) |
| 17 | 15, 16 | elind 4153 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ (𝑈 ∩ Cat)) |
| 18 | 7, 8, 14 | catcbas 18153 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (Base‘𝐸) = (𝑈 ∩ Cat)) |
| 19 | 17, 18 | eleqtrrd 2866 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ (Base‘𝐸)) |
| 20 | termorcl 18043 | . . . . . . 7 ⊢ (𝐶 ∈ (TermO‘𝐸) → 𝐸 ∈ Cat) | |
| 21 | 10, 20 | syl 18 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐸 ∈ Cat) |
| 22 | 7, 14, 15, 5 | termcterm 50291 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ (TermO‘𝐸)) |
| 23 | 21, 10, 22 | termoeu1w 18071 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐶( ≃𝑐 ‘𝐸)𝑑) |
| 24 | 7, 8, 14, 12, 19, 23 | thincciso4 50235 | . . . 4 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (𝐶 ∈ ThinCat ↔ 𝑑 ∈ ThinCat)) |
| 25 | 6, 24 | mpbird 260 | . . 3 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐶 ∈ ThinCat) |
| 26 | 21, 10, 22 | termoeu1 18070 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → ∃!𝑓 𝑓 ∈ (𝐶(Iso‘𝐸)𝑑)) |
| 27 | euex 2605 | . . . . . 6 ⊢ (∃!𝑓 𝑓 ∈ (𝐶(Iso‘𝐸)𝑑) → ∃𝑓 𝑓 ∈ (𝐶(Iso‘𝐸)𝑑)) | |
| 28 | 26, 27 | syl 18 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → ∃𝑓 𝑓 ∈ (𝐶(Iso‘𝐸)𝑑)) |
| 29 | eqid 2763 | . . . . . . . 8 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 30 | eqid 2763 | . . . . . . . 8 ⊢ (Base‘𝑑) = (Base‘𝑑) | |
| 31 | eqid 2763 | . . . . . . . 8 ⊢ (Iso‘𝐸) = (Iso‘𝐸) | |
| 32 | 7, 8, 29, 30, 14, 12, 19, 31 | catciso 18163 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (𝑓 ∈ (𝐶(Iso‘𝐸)𝑑) ↔ (𝑓 ∈ ((𝐶 Full 𝑑) ∩ (𝐶 Faith 𝑑)) ∧ (1st ‘𝑓):(Base‘𝐶)–1-1-onto→(Base‘𝑑)))) |
| 33 | 32 | simplbda 504 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) ∧ 𝑓 ∈ (𝐶(Iso‘𝐸)𝑑)) → (1st ‘𝑓):(Base‘𝐶)–1-1-onto→(Base‘𝑑)) |
| 34 | fvex 6894 | . . . . . . 7 ⊢ (Base‘𝐶) ∈ V | |
| 35 | 34 | f1oen 8965 | . . . . . 6 ⊢ ((1st ‘𝑓):(Base‘𝐶)–1-1-onto→(Base‘𝑑) → (Base‘𝐶) ≈ (Base‘𝑑)) |
| 36 | 33, 35 | syl 18 | . . . . 5 ⊢ (((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) ∧ 𝑓 ∈ (𝐶(Iso‘𝐸)𝑑)) → (Base‘𝐶) ≈ (Base‘𝑑)) |
| 37 | 28, 36 | exlimddv 1965 | . . . 4 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (Base‘𝐶) ≈ (Base‘𝑑)) |
| 38 | 30 | istermc3 50254 | . . . . . 6 ⊢ (𝑑 ∈ TermCat ↔ (𝑑 ∈ ThinCat ∧ (Base‘𝑑) ≈ 1o)) |
| 39 | 5, 38 | sylib 221 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (𝑑 ∈ ThinCat ∧ (Base‘𝑑) ≈ 1o)) |
| 40 | 39 | simprd 500 | . . . 4 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (Base‘𝑑) ≈ 1o) |
| 41 | entr 8999 | . . . 4 ⊢ (((Base‘𝐶) ≈ (Base‘𝑑) ∧ (Base‘𝑑) ≈ 1o) → (Base‘𝐶) ≈ 1o) | |
| 42 | 37, 40, 41 | syl2anc 595 | . . 3 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (Base‘𝐶) ≈ 1o) |
| 43 | 29 | istermc3 50254 | . . 3 ⊢ (𝐶 ∈ TermCat ↔ (𝐶 ∈ ThinCat ∧ (Base‘𝐶) ≈ 1o)) |
| 44 | 25, 42, 43 | sylanbrc 594 | . 2 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐶 ∈ TermCat) |
| 45 | 3, 44 | exlimddv 1965 | 1 ⊢ (𝜑 → 𝐶 ∈ TermCat) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 400 = wceq 1570 ∃wex 1809 ∈ wcel 2143 ∃!weu 2596 ≠ wne 2958 Vcvv 3455 ∩ cin 3904 ∅c0 4286 class class class wbr 5109 –1-1-onto→wf1o 6535 ‘cfv 6536 (class class class)co 7410 1st c1st 7980 1oc1o 8442 ≈ cen 8936 Basecbs 17264 Catccat 17715 Isociso 17798 Full cful 17956 Faith cfth 17957 TermOctermo 18034 CatCatccatc 18150 ThinCatcthinc 50195 TermCatctermc 50250 |
| This theorem was proved from 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 11151 ax-resscn 11152 ax-1cn 11153 ax-icn 11154 ax-addcl 11155 ax-addrcl 11156 ax-mulcl 11157 ax-mulrcl 11158 ax-mulcom 11159 ax-addass 11160 ax-mulass 11161 ax-distr 11162 ax-i2m1 11163 ax-1ne0 11164 ax-1rid 11165 ax-rnegex 11166 ax-rrecex 11167 ax-cnre 11168 ax-pre-lttri 11169 ax-pre-lttrn 11170 ax-pre-ltadd 11171 ax-pre-mulgt0 11172 |
| This theorem 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-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 11240 df-mnf 11241 df-xr 11242 df-ltxr 11243 df-le 11244 df-sub 11438 df-neg 11439 df-nn 12229 df-2 12298 df-3 12299 df-4 12300 df-5 12301 df-6 12302 df-7 12303 df-8 12304 df-9 12305 df-n0 12500 df-z 12587 df-dec 12707 df-uz 12858 df-fz 13531 df-struct 17202 df-slot 17237 df-ndx 17249 df-base 17265 df-hom 17329 df-cco 17330 df-cat 17719 df-cid 17720 df-sect 17799 df-inv 17800 df-iso 17801 df-cic 17848 df-func 17910 df-idfu 17911 df-cofu 17912 df-full 17958 df-fth 17959 df-termo 18037 df-catc 18151 df-thinc 50196 df-termc 50251 |
| This theorem is referenced by: termcterm3 50293 termcciso 50294 termc2 50296 |
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