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| Mirrors > Home > MPE Home > Th. List > Mathboxes > termcterm3 | Structured version Visualization version GIF version | ||
| Description: In the category of small categories, a terminal object is equivalent to a terminal category. (Contributed by Zhi Wang, 18-Oct-2025.) |
| Ref | Expression |
|---|---|
| termcterm.e | ⊢ 𝐸 = (CatCat‘𝑈) |
| termcterm3.u | ⊢ (𝜑 → 𝑈 ∈ 𝑉) |
| termcterm3.c | ⊢ (𝜑 → 𝐶 ∈ 𝑈) |
| termcterm3.1 | ⊢ (𝜑 → (SetCat‘1o) ∈ 𝑈) |
| Ref | Expression |
|---|---|
| termcterm3 | ⊢ (𝜑 → (𝐶 ∈ TermCat ↔ 𝐶 ∈ (TermO‘𝐸))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | termcterm.e | . . 3 ⊢ 𝐸 = (CatCat‘𝑈) | |
| 2 | termcterm3.u | . . . 4 ⊢ (𝜑 → 𝑈 ∈ 𝑉) | |
| 3 | 2 | adantr 480 | . . 3 ⊢ ((𝜑 ∧ 𝐶 ∈ TermCat) → 𝑈 ∈ 𝑉) |
| 4 | termcterm3.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ 𝑈) | |
| 5 | 4 | adantr 480 | . . 3 ⊢ ((𝜑 ∧ 𝐶 ∈ TermCat) → 𝐶 ∈ 𝑈) |
| 6 | simpr 484 | . . 3 ⊢ ((𝜑 ∧ 𝐶 ∈ TermCat) → 𝐶 ∈ TermCat) | |
| 7 | 1, 3, 5, 6 | termcterm 49988 | . 2 ⊢ ((𝜑 ∧ 𝐶 ∈ TermCat) → 𝐶 ∈ (TermO‘𝐸)) |
| 8 | termcterm3.1 | . . . . . 6 ⊢ (𝜑 → (SetCat‘1o) ∈ 𝑈) | |
| 9 | setc1oterm 49966 | . . . . . . 7 ⊢ (SetCat‘1o) ∈ TermCat | |
| 10 | 9 | a1i 11 | . . . . . 6 ⊢ (𝜑 → (SetCat‘1o) ∈ TermCat) |
| 11 | 8, 10 | elind 4140 | . . . . 5 ⊢ (𝜑 → (SetCat‘1o) ∈ (𝑈 ∩ TermCat)) |
| 12 | 11 | ne0d 4282 | . . . 4 ⊢ (𝜑 → (𝑈 ∩ TermCat) ≠ ∅) |
| 13 | 12 | adantr 480 | . . 3 ⊢ ((𝜑 ∧ 𝐶 ∈ (TermO‘𝐸)) → (𝑈 ∩ TermCat) ≠ ∅) |
| 14 | simpr 484 | . . 3 ⊢ ((𝜑 ∧ 𝐶 ∈ (TermO‘𝐸)) → 𝐶 ∈ (TermO‘𝐸)) | |
| 15 | 1, 13, 14 | termcterm2 49989 | . 2 ⊢ ((𝜑 ∧ 𝐶 ∈ (TermO‘𝐸)) → 𝐶 ∈ TermCat) |
| 16 | 7, 15 | impbida 801 | 1 ⊢ (𝜑 → (𝐶 ∈ TermCat ↔ 𝐶 ∈ (TermO‘𝐸))) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 ≠ wne 2932 ∩ cin 3888 ∅c0 4273 ‘cfv 6498 1oc1o 8398 TermOctermo 17949 SetCatcsetc 18042 CatCatccatc 18065 TermCatctermc 49947 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2708 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-tp 4572 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-1st 7942 df-2nd 7943 df-supp 8111 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-1o 8405 df-er 8643 df-map 8775 df-ixp 8846 df-en 8894 df-dom 8895 df-sdom 8896 df-fin 8897 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-nn 12175 df-2 12244 df-3 12245 df-4 12246 df-5 12247 df-6 12248 df-7 12249 df-8 12250 df-9 12251 df-n0 12438 df-z 12525 df-dec 12645 df-uz 12789 df-fz 13462 df-struct 17117 df-slot 17152 df-ndx 17164 df-base 17180 df-hom 17244 df-cco 17245 df-cat 17634 df-cid 17635 df-sect 17714 df-inv 17715 df-iso 17716 df-cic 17763 df-func 17825 df-idfu 17826 df-cofu 17827 df-full 17873 df-fth 17874 df-termo 17952 df-setc 18043 df-catc 18066 df-thinc 49893 df-termc 49948 |
| This theorem is referenced by: (None) |
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