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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 4303 | . . 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 4105 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ TermCat) |
| 6 | 5 | termcthind 50944 | . . . 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 486 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐶 ∈ (TermO‘𝐸)) |
| 11 | 8 | termoo2 50686 | . . . . . . 7 ⊢ (𝐶 ∈ (TermO‘𝐸) → 𝐶 ∈ (Base‘𝐸)) |
| 12 | 10, 11 | syl 18 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐶 ∈ (Base‘𝐸)) |
| 13 | 7, 8 | elbasfv 17437 | . . . . . 6 ⊢ (𝐶 ∈ (Base‘𝐸) → 𝑈 ∈ V) |
| 14 | 12, 13 | syl 18 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑈 ∈ V) |
| 15 | 4 | elin1d 4104 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ 𝑈) |
| 16 | 5 | termccatd 50945 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ Cat) |
| 17 | 15, 16 | elind 4100 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ (𝑈 ∩ Cat)) |
| 18 | 7, 8, 14 | catcbas 18326 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (Base‘𝐸) = (𝑈 ∩ Cat)) |
| 19 | 17, 18 | eleqtrrd 2867 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ (Base‘𝐸)) |
| 20 | termorcl 18216 | . . . . . . 7 ⊢ (𝐶 ∈ (TermO‘𝐸) → 𝐸 ∈ Cat) | |
| 21 | 10, 20 | syl 18 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐸 ∈ Cat) |
| 22 | 7, 14, 15, 5 | termcterm 50979 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝑑 ∈ (TermO‘𝐸)) |
| 23 | 21, 10, 22 | termoeu1w 18244 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → 𝐶( ≃𝑐 ‘𝐸)𝑑) |
| 24 | 7, 8, 14, 12, 19, 23 | thincciso4 50923 | . . . 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 18243 | . . . . . 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 18336 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (𝑓 ∈ (𝐶(Iso‘𝐸)𝑑) ↔ (𝑓 ∈ ((𝐶 Full 𝑑) ∩ (𝐶 Faith 𝑑)) ∧ (1st ‘𝑓):(Base‘𝐶)⟶1-1onto(Base‘𝑑)))) |
| 33 | 32 | simplbda 505 | . . . . . 6 ⊢ (((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) ∧ 𝑓 ∈ (𝐶(Iso‘𝐸)𝑑)) → (1st ‘𝑓):(Base‘𝐶)⟶1-1onto(Base‘𝑑)) |
| 34 | fvex 6929 | . . . . . . 7 ⊢ (Base‘𝐶) ∈ V | |
| 35 | 34 | f1oen 9037 | . . . . . 6 ⊢ ((1st ‘𝑓):(Base‘𝐶)⟶1-1onto(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 1970 | . . . 4 ⊢ ((𝜑 ∧ 𝑑 ∈ (𝑈 ∩ TermCat)) → (Base‘𝐶) ≈ (Base‘𝑑)) |
| 38 | 30 | istermc3 50942 | . . . . . 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 9071 | . . . 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 50942 | . . 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 1970 | 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 2147 ∃!weu 2596 ≠ wne 2959 Vcvv 3454 ∩ cin 4092 ∅c0 4281 class class class wbr 5108 ⟶1-1ontowf1o 6565 ‘cfv 6566 (class class class)co 7451 1st c1st 8033 1oc1o 8507 ≈ cen 9008 Basecbs 17431 Catccat 17888 Isociso 17971 Full cful 18129 Faith cfth 18130 TermOctermo 18207 CatCatccatc 18323 ThinCatcthinc 50883 TermCatctermc 50938 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5238 ax-sep 5255 ax-nul 5266 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-cnex 11295 ax-resscn 11296 ax-1cn 11297 ax-icn 11298 ax-addcl 11299 ax-addrcl 11300 ax-mulcl 11301 ax-mulrcl 11302 ax-mulcom 11303 ax-addass 11304 ax-mulass 11305 ax-distr 11306 ax-i2m1 11307 ax-1ne0 11308 ax-1rid 11309 ax-rnegex 11310 ax-rrecex 11311 ax-cnre 11312 ax-pre-lttri 11313 ax-pre-lttrn 11314 ax-pre-ltadd 11315 ax-pre-mulgt0 11316 |
| 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 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4841 df-uni 4873 df-iun 4958 df-br 5109 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5553 df-eprel 5558 df-po 5566 df-so 5567 df-fr 5611 df-we 5613 df-xp 5664 df-rel 5665 df-cnv 5666 df-co 5667 df-dm 5668 df-rn 5669 df-res 5670 df-ima 5671 df-pred 6330 df-ord 6391 df-on 6392 df-lim 6393 df-suc 6394 df-iota 6520 df-fun 6568 df-fn 6569 df-f 6570 df-f1 6571 df-fo 6572 df-f1o 6573 df-fv 6574 df-riota 7408 df-ov 7454 df-oprab 7455 df-mpo 7456 df-om 7912 df-1st 8035 df-2nd 8036 df-supp 8215 df-frecs 8337 df-wrecs 8368 df-recs 8417 df-rdg 8456 df-1o 8514 df-er 8755 df-map 8887 df-ixp 8964 df-en 9012 df-dom 9013 df-sdom 9014 df-fin 9015 df-pnf 11384 df-mnf 11385 df-xr 11386 df-ltxr 11387 df-le 11388 df-sub 11582 df-neg 11583 df-nn 12376 df-2 12445 df-3 12446 df-4 12447 df-5 12448 df-6 12449 df-7 12450 df-8 12451 df-9 12452 df-n0 12647 df-z 12734 df-dec 12855 df-uz 13006 df-fz 13680 df-struct 17369 df-slot 17404 df-ndx 17416 df-base 17432 df-hom 17497 df-cco 17498 df-cat 17892 df-cid 17893 df-sect 17972 df-inv 17973 df-iso 17974 df-cic 18021 df-func 18083 df-idfu 18084 df-cofu 18085 df-full 18131 df-fth 18132 df-termo 18210 df-catc 18324 df-thinc 50884 df-termc 50939 |
| This theorem is used by: termcterm3 50981 termcciso 50982 termc2 50984 |
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