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| Mirrors > Home > MPE Home > Th. List > Mathboxes > termoeu2 | Structured version Visualization version GIF version | ||
| Description: Terminal objects are essentially unique; if 𝐴 is a terminal object, then so is every object that is isomorphic to 𝐴. (Contributed by Zhi Wang, 26-Oct-2025.) |
| Ref | Expression |
|---|---|
| termoeu2.c | ⊢ (𝜑 → 𝐶 ∈ Cat) |
| termoeu2.a | ⊢ (𝜑 → 𝐴 ∈ (TermO‘𝐶)) |
| termoeu2.i | ⊢ (𝜑 → 𝐴( ≃𝑐 ‘𝐶)𝐵) |
| Ref | Expression |
|---|---|
| termoeu2 | ⊢ (𝜑 → 𝐵 ∈ (TermO‘𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | termoeu2.c | . . . 4 ⊢ (𝜑 → 𝐶 ∈ Cat) | |
| 2 | eqid 2763 | . . . . 5 ⊢ (oppCat‘𝐶) = (oppCat‘𝐶) | |
| 3 | 2 | oppccat 17773 | . . . 4 ⊢ (𝐶 ∈ Cat → (oppCat‘𝐶) ∈ Cat) |
| 4 | 1, 3 | syl 18 | . . 3 ⊢ (𝜑 → (oppCat‘𝐶) ∈ Cat) |
| 5 | termoeu2.a | . . . 4 ⊢ (𝜑 → 𝐴 ∈ (TermO‘𝐶)) | |
| 6 | oppctermo 50014 | . . . 4 ⊢ (𝐴 ∈ (TermO‘𝐶) ↔ 𝐴 ∈ (InitO‘(oppCat‘𝐶))) | |
| 7 | 5, 6 | sylib 221 | . . 3 ⊢ (𝜑 → 𝐴 ∈ (InitO‘(oppCat‘𝐶))) |
| 8 | termoeu2.i | . . . 4 ⊢ (𝜑 → 𝐴( ≃𝑐 ‘𝐶)𝐵) | |
| 9 | 2, 8 | oppccic 49822 | . . 3 ⊢ (𝜑 → 𝐴( ≃𝑐 ‘(oppCat‘𝐶))𝐵) |
| 10 | 4, 7, 9 | initoeu2 18068 | . 2 ⊢ (𝜑 → 𝐵 ∈ (InitO‘(oppCat‘𝐶))) |
| 11 | oppctermo 50014 | . 2 ⊢ (𝐵 ∈ (TermO‘𝐶) ↔ 𝐵 ∈ (InitO‘(oppCat‘𝐶))) | |
| 12 | 10, 11 | sylibr 237 | 1 ⊢ (𝜑 → 𝐵 ∈ (TermO‘𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2143 class class class wbr 5109 ‘cfv 6536 Catccat 17715 oppCatcoppc 17762 ≃𝑐 ccic 17847 InitOcinito 18033 TermOctermo 18034 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5238 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-cnex 11151 ax-resscn 11152 ax-1cn 11153 ax-icn 11154 ax-addcl 11155 ax-addrcl 11156 ax-mulcl 11157 ax-mulrcl 11158 ax-mulcom 11159 ax-addass 11160 ax-mulass 11161 ax-distr 11162 ax-i2m1 11163 ax-1ne0 11164 ax-1rid 11165 ax-rnegex 11166 ax-rrecex 11167 ax-cnre 11168 ax-pre-lttri 11169 ax-pre-lttrn 11170 ax-pre-ltadd 11171 ax-pre-mulgt0 11172 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7859 df-1st 7982 df-2nd 7983 df-supp 8153 df-tpos 8218 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11240 df-mnf 11241 df-xr 11242 df-ltxr 11243 df-le 11244 df-sub 11438 df-neg 11439 df-nn 12229 df-2 12298 df-3 12299 df-4 12300 df-5 12301 df-6 12302 df-7 12303 df-8 12304 df-9 12305 df-n0 12500 df-z 12587 df-dec 12707 df-sets 17219 df-slot 17237 df-ndx 17249 df-base 17265 df-hom 17329 df-cco 17330 df-cat 17719 df-cid 17720 df-homf 17721 df-comf 17722 df-oppc 17763 df-sect 17799 df-inv 17800 df-iso 17801 df-cic 17848 df-inito 18036 df-termo 18037 |
| This theorem is referenced by: termcciso 50294 |
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