| Mathbox for Zhi Wang |
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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 2766 | . . . 4 ⊢ (⊤ → (SetCat‘{{𝐴}}) = (SetCat‘{{𝐴}})) | |
| 2 | snex 5412 | . . . . 5 ⊢ {{𝐴}} ∈ V | |
| 3 | 2 | a1i 11 | . . . 4 ⊢ (⊤ → {{𝐴}} ∈ V) |
| 4 | velsn 4607 | . . . . . . 7 ⊢ (𝑥 ∈ {{𝐴}} ↔ 𝑥 = {𝐴}) | |
| 5 | mosn 49624 | . . . . . . 7 ⊢ (𝑥 = {𝐴} → ∃*𝑝 𝑝 ∈ 𝑥) | |
| 6 | 4, 5 | sylbi 220 | . . . . . 6 ⊢ (𝑥 ∈ {{𝐴}} → ∃*𝑝 𝑝 ∈ 𝑥) |
| 7 | 6 | rgen 3083 | . . . . 5 ⊢ ∀𝑥 ∈ {{𝐴}}∃*𝑝 𝑝 ∈ 𝑥 |
| 8 | 7 | a1i 11 | . . . 4 ⊢ (⊤ → ∀𝑥 ∈ {{𝐴}}∃*𝑝 𝑝 ∈ 𝑥) |
| 9 | 1, 3, 8 | setcthin 50276 | . . 3 ⊢ (⊤ → (SetCat‘{{𝐴}}) ∈ ThinCat) |
| 10 | 9 | mptru 1577 | . 2 ⊢ (SetCat‘{{𝐴}}) ∈ ThinCat |
| 11 | snex 5412 | . . 3 ⊢ {𝐴} ∈ V | |
| 12 | 11 | ensn1 9020 | . 2 ⊢ {{𝐴}} ≈ 1o |
| 13 | eqid 2765 | . . . . 5 ⊢ (SetCat‘{{𝐴}}) = (SetCat‘{{𝐴}}) | |
| 14 | 13, 3 | setcbas 18153 | . . . 4 ⊢ (⊤ → {{𝐴}} = (Base‘(SetCat‘{{𝐴}}))) |
| 15 | 14 | mptru 1577 | . . 3 ⊢ {{𝐴}} = (Base‘(SetCat‘{{𝐴}})) |
| 16 | 15 | istermc3 50287 | . 2 ⊢ ((SetCat‘{{𝐴}}) ∈ TermCat ↔ ((SetCat‘{{𝐴}}) ∈ ThinCat ∧ {{𝐴}} ≈ 1o)) |
| 17 | 10, 12, 16 | mpbir2an 724 | 1 ⊢ (SetCat‘{{𝐴}}) ∈ TermCat |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ⊤wtru 1571 ∈ wcel 2146 ∃*wmo 2567 ∀wral 3081 Vcvv 3457 {csn 4591 class class class wbr 5111 ‘cfv 6540 1oc1o 8448 ≈ cen 8942 Basecbs 17287 SetCatcsetc 18150 ThinCatcthinc 50228 TermCatctermc 50283 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-10 2179 ax-11 2195 ax-12 2216 ax-ext 2737 ax-rep 5240 ax-sep 5259 ax-nul 5271 ax-pow 5338 ax-pr 5406 ax-un 7738 ax-cnex 11167 ax-resscn 11168 ax-1cn 11169 ax-icn 11170 ax-addcl 11171 ax-addrcl 11172 ax-mulcl 11173 ax-mulrcl 11174 ax-mulcom 11175 ax-addass 11176 ax-mulass 11177 ax-distr 11178 ax-i2m1 11179 ax-1ne0 11180 ax-1rid 11181 ax-rnegex 11182 ax-rrecex 11183 ax-cnre 11184 ax-pre-lttri 11185 ax-pre-lttrn 11186 ax-pre-ltadd 11187 ax-pre-mulgt0 11188 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2569 df-eu 2599 df-clab 2744 df-cleq 2757 df-clel 2840 df-nfc 2914 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rmo 3371 df-reu 3372 df-rab 3419 df-v 3459 df-sbc 3747 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-tp 4596 df-op 4598 df-uni 4875 df-iun 4960 df-br 5112 df-opab 5176 df-mpt 5195 df-tr 5221 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6306 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6496 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-riota 7373 df-ov 7419 df-oprab 7420 df-mpo 7421 df-om 7865 df-1st 7988 df-2nd 7989 df-frecs 8280 df-wrecs 8311 df-recs 8360 df-rdg 8399 df-1o 8455 df-er 8696 df-map 8828 df-en 8946 df-dom 8947 df-sdom 8948 df-fin 8949 df-pnf 11256 df-mnf 11257 df-xr 11258 df-ltxr 11259 df-le 11260 df-sub 11454 df-neg 11455 df-nn 12245 df-2 12314 df-3 12315 df-4 12316 df-5 12317 df-6 12318 df-7 12319 df-8 12320 df-9 12321 df-n0 12516 df-z 12603 df-dec 12724 df-uz 12875 df-fz 13548 df-struct 17225 df-slot 17260 df-ndx 17272 df-base 17288 df-hom 17352 df-cco 17353 df-cat 17742 df-cid 17743 df-setc 18151 df-thinc 50229 df-termc 50284 |
| This theorem is used by: setc1oterm 50302 |
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