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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 4300 | . . 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 4151 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ TermCat) |
| 6 | 5 | termcthind 50404 | . . . 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 50159 | . . . . . . 7 ⊢ (𝐶 ∈ (TermO‘𝐸) → 𝐶 ∈ (Base‘𝐸)) |
| 12 | 10, 11 | syl 18 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐶 ∈ (Base‘𝐸)) |
| 13 | 7, 8 | elbasfv 17307 | . . . . . 6 ⊢ (𝐶 ∈ (Base‘𝐸) → 𝑈 ∈ V) |
| 14 | 12, 13 | syl 18 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑈 ∈ V) |
| 15 | 4 | elin1d 4150 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ 𝑈) |
| 16 | 5 | termccd 50405 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ Cat) |
| 17 | 15, 16 | elind 4146 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ (𝑈 ∩ Cat)) |
| 18 | 7, 8, 14 | catcbas 18190 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (Base‘𝐸) = (𝑈 ∩ Cat)) |
| 19 | 17, 18 | eleqtrrd 2863 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ (Base‘𝐸)) |
| 20 | termorcl 18080 | . . . . . . 7 ⊢ (𝐶 ∈ (TermO‘𝐸) → 𝐸 ∈ Cat) | |
| 21 | 10, 20 | syl 18 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐸 ∈ Cat) |
| 22 | 7, 14, 15, 5 | termcterm 50439 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ (TermO‘𝐸)) |
| 23 | 21, 10, 22 | termoeu1w 18108 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐶( ≃𝑐 ‘𝐸)𝑑) |
| 24 | 7, 8, 14, 12, 19, 23 | thincciso4 50383 | . . . 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 18107 | . . . . . 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 18200 | . . . . . . 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 6891 | . . . . . . 7 ⊢ (Base‘𝐶) ∈ V | |
| 35 | 34 | f1oen 8978 | . . . . . 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 1968 | . . . 4 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (Base‘𝐶) ≈ (Base‘𝑑)) |
| 38 | 30 | istermc3 50402 | . . . . . 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 9012 | . . . 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 50402 | . . 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 1968 | 1 ⊢ (𝜑 → 𝐶 ∈ TermCat) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∃wex 1812 ∈ wcel 2145 ∃!weu 2593 ≠ wne 2955 Vcvv 3450 ∩ cin 3898 ∅c0 4279 class class class wbr 5103 –1-1-onto→wf1o 6532 ‘cfv 6533 (class class class)co 7413 1st c1st 7984 1oc1o 8448 ≈ cen 8949 Basecbs 17301 Catccat 17752 Isociso 17835 Full cful 17993 Faith cfth 17994 TermOctermo 18071 CatCatccatc 18187 ThinCatcthinc 50343 TermCatctermc 50398 |
| 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 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7736 ax-cnex 11180 ax-resscn 11181 ax-1cn 11182 ax-icn 11183 ax-addcl 11184 ax-addrcl 11185 ax-mulcl 11186 ax-mulrcl 11187 ax-mulcom 11188 ax-addass 11189 ax-mulass 11190 ax-distr 11191 ax-i2m1 11192 ax-1ne0 11193 ax-1rid 11194 ax-rnegex 11195 ax-rrecex 11196 ax-cnre 11197 ax-pre-lttri 11198 ax-pre-lttrn 11199 ax-pre-ltadd 11200 ax-pre-mulgt0 11201 |
| 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 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 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-tp 4589 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7370 df-ov 7416 df-oprab 7417 df-mpo 7418 df-om 7863 df-1st 7986 df-2nd 7987 df-supp 8159 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-1o 8455 df-er 8696 df-map 8828 df-ixp 8905 df-en 8953 df-dom 8954 df-sdom 8955 df-fin 8956 df-pnf 11269 df-mnf 11270 df-xr 11271 df-ltxr 11272 df-le 11273 df-sub 11467 df-neg 11468 df-nn 12258 df-2 12327 df-3 12328 df-4 12329 df-5 12330 df-6 12331 df-7 12332 df-8 12333 df-9 12334 df-n0 12529 df-z 12616 df-dec 12737 df-uz 12888 df-fz 13562 df-struct 17239 df-slot 17274 df-ndx 17286 df-base 17302 df-hom 17366 df-cco 17367 df-cat 17756 df-cid 17757 df-sect 17836 df-inv 17837 df-iso 17838 df-cic 17885 df-func 17947 df-idfu 17948 df-cofu 17949 df-full 17995 df-fth 17996 df-termo 18074 df-catc 18188 df-thinc 50344 df-termc 50399 |
| This theorem is used by: termcterm3 50441 termcciso 50442 termc2 50444 |
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