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| Mirrors > Home > MPE Home > Th. List > Mathboxes > termcterm | Structured version Visualization version GIF version | ||
| Description: A terminal category is a terminal object of the category of small categories. (Contributed by Zhi Wang, 17-Oct-2025.) |
| Ref | Expression |
|---|---|
| termcterm.e | ⊢ 𝐸 = (CatCat‘𝑈) |
| termcterm.u | ⊢ (𝜑 → 𝑈 ∈ 𝑉) |
| termcterm.c | ⊢ (𝜑 → 𝐶 ∈ 𝑈) |
| termcterm.t | ⊢ (𝜑 → 𝐶 ∈ TermCat) |
| Ref | Expression |
|---|---|
| termcterm | ⊢ (𝜑 → 𝐶 ∈ (TermO‘𝐸)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | simpr 488 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (Base‘𝐸)) → 𝑑 ∈ (Base‘𝐸)) | |
| 2 | termcterm.e | . . . . . . . . 9 ⊢ 𝐸 = (CatCat‘𝑈) | |
| 3 | eqid 2761 | . . . . . . . . 9 ⊢ (Base‘𝐸) = (Base‘𝐸) | |
| 4 | termcterm.u | . . . . . . . . 9 ⊢ (𝜑 → 𝑈 ∈ 𝑉) | |
| 5 | 2, 3, 4 | catcbas 18125 | . . . . . . . 8 ⊢ (𝜑 → (Base‘𝐸) = (𝑈 ∩ Cat)) |
| 6 | 5 | adantr 484 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (Base‘𝐸)) → (Base‘𝐸) = (𝑈 ∩ Cat)) |
| 7 | 1, 6 | eleqtrd 2863 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (Base‘𝐸)) → 𝑑 ∈ (𝑈 ∩ Cat)) |
| 8 | 7 | elin2d 4155 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (Base‘𝐸)) → 𝑑 ∈ Cat) |
| 9 | termcterm.t | . . . . . 6 ⊢ (𝜑 → 𝐶 ∈ TermCat) | |
| 10 | 9 | adantr 484 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (Base‘𝐸)) → 𝐶 ∈ TermCat) |
| 11 | 8, 10 | functermceu 50092 | . . . 4 ⊢ ((𝜑 ∧ 𝑑 ∈ (Base‘𝐸)) → ∃!𝑓 𝑓 ∈ (𝑑 Func 𝐶)) |
| 12 | 4 | adantr 484 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (Base‘𝐸)) → 𝑈 ∈ 𝑉) |
| 13 | eqid 2761 | . . . . . . 7 ⊢ (Hom ‘𝐸) = (Hom ‘𝐸) | |
| 14 | termcterm.c | . . . . . . . . . 10 ⊢ (𝜑 → 𝐶 ∈ 𝑈) | |
| 15 | 9 | termccd 50061 | . . . . . . . . . 10 ⊢ (𝜑 → 𝐶 ∈ Cat) |
| 16 | 14, 15 | elind 4150 | . . . . . . . . 9 ⊢ (𝜑 → 𝐶 ∈ (𝑈 ∩ Cat)) |
| 17 | 16, 5 | eleqtrrd 2864 | . . . . . . . 8 ⊢ (𝜑 → 𝐶 ∈ (Base‘𝐸)) |
| 18 | 17 | adantr 484 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑑 ∈ (Base‘𝐸)) → 𝐶 ∈ (Base‘𝐸)) |
| 19 | 2, 3, 12, 13, 1, 18 | catchom 18127 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑑 ∈ (Base‘𝐸)) → (𝑑(Hom ‘𝐸)𝐶) = (𝑑 Func 𝐶)) |
| 20 | 19 | eleq2d 2847 | . . . . 5 ⊢ ((𝜑 ∧ 𝑑 ∈ (Base‘𝐸)) → (𝑓 ∈ (𝑑(Hom ‘𝐸)𝐶) ↔ 𝑓 ∈ (𝑑 Func 𝐶))) |
| 21 | 20 | eubidv 2612 | . . . 4 ⊢ ((𝜑 ∧ 𝑑 ∈ (Base‘𝐸)) → (∃!𝑓 𝑓 ∈ (𝑑(Hom ‘𝐸)𝐶) ↔ ∃!𝑓 𝑓 ∈ (𝑑 Func 𝐶))) |
| 22 | 11, 21 | mpbird 259 | . . 3 ⊢ ((𝜑 ∧ 𝑑 ∈ (Base‘𝐸)) → ∃!𝑓 𝑓 ∈ (𝑑(Hom ‘𝐸)𝐶)) |
| 23 | 22 | ralrimiva 3153 | . 2 ⊢ (𝜑 → ∀𝑑 ∈ (Base‘𝐸)∃!𝑓 𝑓 ∈ (𝑑(Hom ‘𝐸)𝐶)) |
| 24 | 2 | catccat 18132 | . . . 4 ⊢ (𝑈 ∈ 𝑉 → 𝐸 ∈ Cat) |
| 25 | 4, 24 | syl 17 | . . 3 ⊢ (𝜑 → 𝐸 ∈ Cat) |
| 26 | 3, 13, 25, 17 | istermo 18021 | . 2 ⊢ (𝜑 → (𝐶 ∈ (TermO‘𝐸) ↔ ∀𝑑 ∈ (Base‘𝐸)∃!𝑓 𝑓 ∈ (𝑑(Hom ‘𝐸)𝐶))) |
| 27 | 23, 26 | mpbird 259 | 1 ⊢ (𝜑 → 𝐶 ∈ (TermO‘𝐸)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 399 = wceq 1559 ∈ wcel 2141 ∃!weu 2594 ∀wral 3075 ∩ cin 3901 ‘cfv 6516 (class class class)co 7391 Basecbs 17236 Hom chom 17288 Catccat 17687 Func cfunc 17878 TermOctermo 18006 CatCatccatc 18122 TermCatctermc 50054 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5224 ax-sep 5243 ax-nul 5253 ax-pow 5319 ax-pr 5387 ax-un 7713 ax-cnex 11123 ax-resscn 11124 ax-1cn 11125 ax-icn 11126 ax-addcl 11127 ax-addrcl 11128 ax-mulcl 11129 ax-mulrcl 11130 ax-mulcom 11131 ax-addass 11132 ax-mulass 11133 ax-distr 11134 ax-i2m1 11135 ax-1ne0 11136 ax-1rid 11137 ax-rnegex 11138 ax-rrecex 11139 ax-cnre 11140 ax-pre-lttri 11141 ax-pre-lttrn 11142 ax-pre-ltadd 11143 ax-pre-mulgt0 11144 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4580 df-pr 4582 df-tp 4584 df-op 4586 df-uni 4863 df-iun 4948 df-br 5098 df-opab 5160 df-mpt 5179 df-tr 5205 df-id 5538 df-eprel 5543 df-po 5551 df-so 5552 df-fr 5596 df-we 5598 df-xp 5649 df-rel 5650 df-cnv 5651 df-co 5652 df-dm 5653 df-rn 5654 df-res 5655 df-ima 5656 df-pred 6283 df-ord 6344 df-on 6345 df-lim 6346 df-suc 6347 df-iota 6472 df-fun 6518 df-fn 6519 df-f 6520 df-f1 6521 df-fo 6522 df-f1o 6523 df-fv 6524 df-riota 7348 df-ov 7394 df-oprab 7395 df-mpo 7396 df-om 7842 df-1st 7965 df-2nd 7966 df-frecs 8256 df-wrecs 8287 df-recs 8336 df-rdg 8375 df-1o 8431 df-er 8672 df-map 8804 df-ixp 8874 df-en 8922 df-dom 8923 df-sdom 8924 df-fin 8925 df-pnf 11212 df-mnf 11213 df-xr 11214 df-ltxr 11215 df-le 11216 df-sub 11410 df-neg 11411 df-nn 12205 df-2 12274 df-3 12275 df-4 12276 df-5 12277 df-6 12278 df-7 12279 df-8 12280 df-9 12281 df-n0 12476 df-z 12563 df-dec 12683 df-uz 12834 df-fz 13507 df-struct 17174 df-slot 17209 df-ndx 17221 df-base 17237 df-hom 17301 df-cco 17302 df-cat 17691 df-cid 17692 df-func 17882 df-idfu 17883 df-cofu 17884 df-termo 18009 df-catc 18123 df-thinc 50000 df-termc 50055 |
| This theorem is referenced by: termcterm2 50096 termcterm3 50097 termcciso 50098 termccisoeu 50099 |
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