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| Mirrors > Home > MPE Home > Th. List > Mathboxes > setcsnterm | Structured version Visualization version GIF version | ||
| Description: The category of one set, either a singleton set or an empty set, is terminal. (Contributed by Zhi Wang, 18-Oct-2025.) |
| Ref | Expression |
|---|---|
| setcsnterm | ⊢ (SetCat‘{{𝐴}}) ∈ TermCat |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqidd 2737 | . . . 4 ⊢ (⊤ → (SetCat‘{{𝐴}}) = (SetCat‘{{𝐴}})) | |
| 2 | snex 5434 | . . . . 5 ⊢ {{𝐴}} ∈ V | |
| 3 | 2 | a1i 11 | . . . 4 ⊢ (⊤ → {{𝐴}} ∈ V) |
| 4 | velsn 4640 | . . . . . . 7 ⊢ (𝑥 ∈ {{𝐴}} ↔ 𝑥 = {𝐴}) | |
| 5 | mosn 48705 | . . . . . . 7 ⊢ (𝑥 = {𝐴} → ∃*𝑝 𝑝 ∈ 𝑥) | |
| 6 | 4, 5 | sylbi 217 | . . . . . 6 ⊢ (𝑥 ∈ {{𝐴}} → ∃*𝑝 𝑝 ∈ 𝑥) |
| 7 | 6 | rgen 3062 | . . . . 5 ⊢ ∀𝑥 ∈ {{𝐴}}∃*𝑝 𝑝 ∈ 𝑥 |
| 8 | 7 | a1i 11 | . . . 4 ⊢ (⊤ → ∀𝑥 ∈ {{𝐴}}∃*𝑝 𝑝 ∈ 𝑥) |
| 9 | 1, 3, 8 | setcthin 49085 | . . 3 ⊢ (⊤ → (SetCat‘{{𝐴}}) ∈ ThinCat) |
| 10 | 9 | mptru 1547 | . 2 ⊢ (SetCat‘{{𝐴}}) ∈ ThinCat |
| 11 | snex 5434 | . . 3 ⊢ {𝐴} ∈ V | |
| 12 | 11 | ensn1 9057 | . 2 ⊢ {{𝐴}} ≈ 1o |
| 13 | eqid 2736 | . . . . 5 ⊢ (SetCat‘{{𝐴}}) = (SetCat‘{{𝐴}}) | |
| 14 | 13, 3 | setcbas 18119 | . . . 4 ⊢ (⊤ → {{𝐴}} = (Base‘(SetCat‘{{𝐴}}))) |
| 15 | 14 | mptru 1547 | . . 3 ⊢ {{𝐴}} = (Base‘(SetCat‘{{𝐴}})) |
| 16 | 15 | istermc3 49096 | . 2 ⊢ ((SetCat‘{{𝐴}}) ∈ TermCat ↔ ((SetCat‘{{𝐴}}) ∈ ThinCat ∧ {{𝐴}} ≈ 1o)) |
| 17 | 10, 12, 16 | mpbir2an 711 | 1 ⊢ (SetCat‘{{𝐴}}) ∈ TermCat |
| Colors of variables: wff setvar class |
| Syntax hints: = wceq 1540 ⊤wtru 1541 ∈ wcel 2108 ∃*wmo 2537 ∀wral 3060 Vcvv 3479 {csn 4624 class class class wbr 5141 ‘cfv 6559 1oc1o 8495 ≈ cen 8978 Basecbs 17243 SetCatcsetc 18116 ThinCatcthinc 49040 TermCatctermc 49092 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2007 ax-8 2110 ax-9 2118 ax-10 2141 ax-11 2157 ax-12 2177 ax-ext 2707 ax-rep 5277 ax-sep 5294 ax-nul 5304 ax-pow 5363 ax-pr 5430 ax-un 7751 ax-cnex 11207 ax-resscn 11208 ax-1cn 11209 ax-icn 11210 ax-addcl 11211 ax-addrcl 11212 ax-mulcl 11213 ax-mulrcl 11214 ax-mulcom 11215 ax-addass 11216 ax-mulass 11217 ax-distr 11218 ax-i2m1 11219 ax-1ne0 11220 ax-1rid 11221 ax-rnegex 11222 ax-rrecex 11223 ax-cnre 11224 ax-pre-lttri 11225 ax-pre-lttrn 11226 ax-pre-ltadd 11227 ax-pre-mulgt0 11228 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2065 df-mo 2539 df-eu 2568 df-clab 2714 df-cleq 2728 df-clel 2815 df-nfc 2891 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3379 df-reu 3380 df-rab 3436 df-v 3481 df-sbc 3788 df-csb 3899 df-dif 3953 df-un 3955 df-in 3957 df-ss 3967 df-pss 3970 df-nul 4333 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-tp 4629 df-op 4631 df-uni 4906 df-iun 4991 df-br 5142 df-opab 5204 df-mpt 5224 df-tr 5258 df-id 5576 df-eprel 5582 df-po 5590 df-so 5591 df-fr 5635 df-we 5637 df-xp 5689 df-rel 5690 df-cnv 5691 df-co 5692 df-dm 5693 df-rn 5694 df-res 5695 df-ima 5696 df-pred 6319 df-ord 6385 df-on 6386 df-lim 6387 df-suc 6388 df-iota 6512 df-fun 6561 df-fn 6562 df-f 6563 df-f1 6564 df-fo 6565 df-f1o 6566 df-fv 6567 df-riota 7386 df-ov 7432 df-oprab 7433 df-mpo 7434 df-om 7884 df-1st 8010 df-2nd 8011 df-frecs 8302 df-wrecs 8333 df-recs 8407 df-rdg 8446 df-1o 8502 df-er 8741 df-map 8864 df-en 8982 df-dom 8983 df-sdom 8984 df-fin 8985 df-pnf 11293 df-mnf 11294 df-xr 11295 df-ltxr 11296 df-le 11297 df-sub 11490 df-neg 11491 df-nn 12263 df-2 12325 df-3 12326 df-4 12327 df-5 12328 df-6 12329 df-7 12330 df-8 12331 df-9 12332 df-n0 12523 df-z 12610 df-dec 12730 df-uz 12875 df-fz 13544 df-struct 17180 df-slot 17215 df-ndx 17227 df-base 17244 df-hom 17317 df-cco 17318 df-cat 17707 df-cid 17708 df-setc 18117 df-thinc 49041 df-termc 49093 |
| This theorem is referenced by: setc1oterm 49107 |
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