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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 4299 | . . 3 ⊢ ((𝑈 ∩ TermCat) ≠ ∅ ↔ ∃𝑑 𝑑 ∈ (𝑈 ∩ TermCat)) | |
| 3 | 1, 2 | sylib 221 | . 2 ⊢ (𝜑 → ∃𝑑 𝑑 ∈ (𝑈 ∩ TermCat)) |
| 4 | simpr 490 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ (𝑈 ∩ TermCat)) | |
| 5 | 4 | elin2d 4102 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ TermCat) |
| 6 | 5 | termcthind 50707 | . . . 4 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ ThinCat) |
| 7 | termcterm.e | . . . . 5 ⊢ 𝐸 = (CatCat‘𝑈) | |
| 8 | eqid 2760 | . . . . 5 ⊢ (Base‘𝐸) = (Base‘𝐸) | |
| 9 | termcterm2.t | . . . . . . . 8 ⊢ (𝜑 → 𝐶 ∈ (TermO‘𝐸)) | |
| 10 | 9 | adantr 486 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐶 ∈ (TermO‘𝐸)) |
| 11 | 8 | termoo2 50449 | . . . . . . 7 ⊢ (𝐶 ∈ (TermO‘𝐸) → 𝐶 ∈ (Base‘𝐸)) |
| 12 | 10, 11 | syl 18 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐶 ∈ (Base‘𝐸)) |
| 13 | 7, 8 | elbasfv 17399 | . . . . . 6 ⊢ (𝐶 ∈ (Base‘𝐸) → 𝑈 ∈ V) |
| 14 | 12, 13 | syl 18 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑈 ∈ V) |
| 15 | 4 | elin1d 4101 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ 𝑈) |
| 16 | 5 | termccatd 50708 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ Cat) |
| 17 | 15, 16 | elind 4097 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ (𝑈 ∩ Cat)) |
| 18 | 7, 8, 14 | catcbas 18282 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (Base‘𝐸) = (𝑈 ∩ Cat)) |
| 19 | 17, 18 | eleqtrrd 2863 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ (Base‘𝐸)) |
| 20 | termorcl 18172 | . . . . . . 7 ⊢ (𝐶 ∈ (TermO‘𝐸) → 𝐸 ∈ Cat) | |
| 21 | 10, 20 | syl 18 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐸 ∈ Cat) |
| 22 | 7, 14, 15, 5 | termcterm 50742 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ (TermO‘𝐸)) |
| 23 | 21, 10, 22 | termoeu1w 18200 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐶( ≃𝑐 ‘𝐸)𝑑) |
| 24 | 7, 8, 14, 12, 19, 23 | thincciso4 50686 | . . . 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 18199 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → ∃!𝑓 𝑓 ∈ (𝐶(Iso‘𝐸)𝑑)) |
| 27 | euex 2602 | . . . . . 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 2760 | . . . . . . . 8 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 30 | eqid 2760 | . . . . . . . 8 ⊢ (Base‘𝑑) = (Base‘𝑑) | |
| 31 | eqid 2760 | . . . . . . . 8 ⊢ (Iso‘𝐸) = (Iso‘𝐸) | |
| 32 | 7, 8, 29, 30, 14, 12, 19, 31 | catciso 18292 | . . . . . . 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 505 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) ∧ 𝑓 ∈ (𝐶(Iso‘𝐸)𝑑)) → (1st ‘𝑓):(Base‘𝐶)–1-1-onto→(Base‘𝑑)) |
| 34 | fvex 6899 | . . . . . . 7 ⊢ (Base‘𝐶) ∈ V | |
| 35 | 34 | f1oen 9003 | . . . . . 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 1967 | . . . 4 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (Base‘𝐶) ≈ (Base‘𝑑)) |
| 38 | 30 | istermc3 50705 | . . . . . 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 501 | . . . 4 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (Base‘𝑑) ≈ 1o) |
| 41 | entr 9037 | . . . 4 ⊢ (((Base‘𝐶) ≈ (Base‘𝑑) ∧ (Base‘𝑑) ≈ 1o) → (Base‘𝐶) ≈ 1o) | |
| 42 | 37, 40, 41 | syl2anc 596 | . . 3 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (Base‘𝐶) ≈ 1o) |
| 43 | 29 | istermc3 50705 | . . 3 ⊢ (𝐶 ∈ TermCat ↔ (𝐶 ∈ ThinCat ∧ (Base‘𝐶) ≈ 1o)) |
| 44 | 25, 42, 43 | sylanbrc 595 | . 2 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐶 ∈ TermCat) |
| 45 | 3, 44 | exlimddv 1967 | 1 ⊢ (𝜑 → 𝐶 ∈ TermCat) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1569 ∃wex 1811 ∈ wcel 2144 ∃!weu 2593 ≠ wne 2955 Vcvv 3450 ∩ cin 4089 ∅c0 4278 class class class wbr 5102 –1-1-onto→wf1o 6538 ‘cfv 6539 (class class class)co 7421 1st c1st 8000 1oc1o 8473 ≈ cen 8974 Basecbs 17393 Catccat 17844 Isociso 17927 Full cful 18085 Faith cfth 18086 TermOctermo 18163 CatCatccatc 18279 ThinCatcthinc 50646 TermCatctermc 50701 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-rep 5231 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7752 ax-cnex 11260 ax-resscn 11261 ax-1cn 11262 ax-icn 11263 ax-addcl 11264 ax-addrcl 11265 ax-mulcl 11266 ax-mulrcl 11267 ax-mulcom 11268 ax-addass 11269 ax-mulass 11270 ax-distr 11271 ax-i2m1 11272 ax-1ne0 11273 ax-1rid 11274 ax-rnegex 11275 ax-rrecex 11276 ax-cnre 11277 ax-pre-lttri 11278 ax-pre-lttrn 11279 ax-pre-ltadd 11280 ax-pre-mulgt0 11281 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4835 df-uni 4867 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6541 df-fn 6542 df-f 6543 df-f1 6544 df-fo 6545 df-f1o 6546 df-fv 6547 df-riota 7378 df-ov 7424 df-oprab 7425 df-mpo 7426 df-om 7879 df-1st 8002 df-2nd 8003 df-supp 8181 df-frecs 8303 df-wrecs 8334 df-recs 8383 df-rdg 8422 df-1o 8480 df-er 8721 df-map 8853 df-ixp 8930 df-en 8978 df-dom 8979 df-sdom 8980 df-fin 8981 df-pnf 11349 df-mnf 11350 df-xr 11351 df-ltxr 11352 df-le 11353 df-sub 11547 df-neg 11548 df-nn 12340 df-2 12409 df-3 12410 df-4 12411 df-5 12412 df-6 12413 df-7 12414 df-8 12415 df-9 12416 df-n0 12611 df-z 12698 df-dec 12819 df-uz 12970 df-fz 13644 df-struct 17331 df-slot 17366 df-ndx 17378 df-base 17394 df-hom 17458 df-cco 17459 df-cat 17848 df-cid 17849 df-sect 17928 df-inv 17929 df-iso 17930 df-cic 17977 df-func 18039 df-idfu 18040 df-cofu 18041 df-full 18087 df-fth 18088 df-termo 18166 df-catc 18280 df-thinc 50647 df-termc 50702 |
| This theorem is used by: termcterm3 50744 termcciso 50745 termc2 50747 |
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