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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 2733 | . . . . 5 ⊢ (oppCat‘𝐶) = (oppCat‘𝐶) | |
| 3 | 2 | oppccat 17636 | . . . 4 ⊢ (𝐶 ∈ Cat → (oppCat‘𝐶) ∈ Cat) |
| 4 | 1, 3 | syl 17 | . . 3 ⊢ (𝜑 → (oppCat‘𝐶) ∈ Cat) |
| 5 | termoeu2.a | . . . 4 ⊢ (𝜑 → 𝐴 ∈ (TermO‘𝐶)) | |
| 6 | oppctermo 49397 | . . . 4 ⊢ (𝐴 ∈ (TermO‘𝐶) ↔ 𝐴 ∈ (InitO‘(oppCat‘𝐶))) | |
| 7 | 5, 6 | sylib 218 | . . 3 ⊢ (𝜑 → 𝐴 ∈ (InitO‘(oppCat‘𝐶))) |
| 8 | termoeu2.i | . . . 4 ⊢ (𝜑 → 𝐴( ≃𝑐 ‘𝐶)𝐵) | |
| 9 | 2, 8 | oppccic 49205 | . . 3 ⊢ (𝜑 → 𝐴( ≃𝑐 ‘(oppCat‘𝐶))𝐵) |
| 10 | 4, 7, 9 | initoeu2 17931 | . 2 ⊢ (𝜑 → 𝐵 ∈ (InitO‘(oppCat‘𝐶))) |
| 11 | oppctermo 49397 | . 2 ⊢ (𝐵 ∈ (TermO‘𝐶) ↔ 𝐵 ∈ (InitO‘(oppCat‘𝐶))) | |
| 12 | 10, 11 | sylibr 234 | 1 ⊢ (𝜑 → 𝐵 ∈ (TermO‘𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∈ wcel 2113 class class class wbr 5095 ‘cfv 6489 Catccat 17578 oppCatcoppc 17625 ≃𝑐 ccic 17710 InitOcinito 17896 TermOctermo 17897 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2705 ax-rep 5221 ax-sep 5238 ax-nul 5248 ax-pow 5307 ax-pr 5374 ax-un 7677 ax-cnex 11073 ax-resscn 11074 ax-1cn 11075 ax-icn 11076 ax-addcl 11077 ax-addrcl 11078 ax-mulcl 11079 ax-mulrcl 11080 ax-mulcom 11081 ax-addass 11082 ax-mulass 11083 ax-distr 11084 ax-i2m1 11085 ax-1ne0 11086 ax-1rid 11087 ax-rnegex 11088 ax-rrecex 11089 ax-cnre 11090 ax-pre-lttri 11091 ax-pre-lttrn 11092 ax-pre-ltadd 11093 ax-pre-mulgt0 11094 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2566 df-clab 2712 df-cleq 2725 df-clel 2808 df-nfc 2882 df-ne 2930 df-nel 3034 df-ral 3049 df-rex 3058 df-rmo 3347 df-reu 3348 df-rab 3397 df-v 3439 df-sbc 3738 df-csb 3847 df-dif 3901 df-un 3903 df-in 3905 df-ss 3915 df-pss 3918 df-nul 4283 df-if 4477 df-pw 4553 df-sn 4578 df-pr 4580 df-op 4584 df-uni 4861 df-iun 4945 df-br 5096 df-opab 5158 df-mpt 5177 df-tr 5203 df-id 5516 df-eprel 5521 df-po 5529 df-so 5530 df-fr 5574 df-we 5576 df-xp 5627 df-rel 5628 df-cnv 5629 df-co 5630 df-dm 5631 df-rn 5632 df-res 5633 df-ima 5634 df-pred 6256 df-ord 6317 df-on 6318 df-lim 6319 df-suc 6320 df-iota 6445 df-fun 6491 df-fn 6492 df-f 6493 df-f1 6494 df-fo 6495 df-f1o 6496 df-fv 6497 df-riota 7312 df-ov 7358 df-oprab 7359 df-mpo 7360 df-om 7806 df-1st 7930 df-2nd 7931 df-supp 8100 df-tpos 8165 df-frecs 8220 df-wrecs 8251 df-recs 8300 df-rdg 8338 df-er 8631 df-en 8880 df-dom 8881 df-sdom 8882 df-pnf 11159 df-mnf 11160 df-xr 11161 df-ltxr 11162 df-le 11163 df-sub 11357 df-neg 11358 df-nn 12137 df-2 12199 df-3 12200 df-4 12201 df-5 12202 df-6 12203 df-7 12204 df-8 12205 df-9 12206 df-n0 12393 df-z 12480 df-dec 12599 df-sets 17082 df-slot 17100 df-ndx 17112 df-base 17128 df-hom 17192 df-cco 17193 df-cat 17582 df-cid 17583 df-homf 17584 df-comf 17585 df-oppc 17626 df-sect 17662 df-inv 17663 df-iso 17664 df-cic 17711 df-inito 17899 df-termo 17900 |
| This theorem is referenced by: termcciso 49677 |
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