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Mirrors > Home > MPE Home > Th. List > Mathboxes > setc2othin | Structured version Visualization version GIF version |
Description: The category (SetCat‘2o) is thin. A special case of setcthin 45952. (Contributed by Zhi Wang, 20-Sep-2024.) |
Ref | Expression |
---|---|
setc2othin | ⊢ (SetCat‘2o) ∈ ThinCat |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqidd 2737 | . . 3 ⊢ (⊤ → (SetCat‘2o) = (SetCat‘2o)) | |
2 | 2oex 8197 | . . . 4 ⊢ 2o ∈ V | |
3 | 2 | a1i 11 | . . 3 ⊢ (⊤ → 2o ∈ V) |
4 | elpri 4549 | . . . . . . 7 ⊢ (𝑥 ∈ {∅, {∅}} → (𝑥 = ∅ ∨ 𝑥 = {∅})) | |
5 | 0ex 5185 | . . . . . . . . 9 ⊢ ∅ ∈ V | |
6 | sneq 4537 | . . . . . . . . . 10 ⊢ (𝑦 = ∅ → {𝑦} = {∅}) | |
7 | 6 | eqeq2d 2747 | . . . . . . . . 9 ⊢ (𝑦 = ∅ → (𝑥 = {𝑦} ↔ 𝑥 = {∅})) |
8 | 5, 7 | spcev 3511 | . . . . . . . 8 ⊢ (𝑥 = {∅} → ∃𝑦 𝑥 = {𝑦}) |
9 | 8 | orim2i 911 | . . . . . . 7 ⊢ ((𝑥 = ∅ ∨ 𝑥 = {∅}) → (𝑥 = ∅ ∨ ∃𝑦 𝑥 = {𝑦})) |
10 | mo0sn 45777 | . . . . . . . 8 ⊢ (∃*𝑧 𝑧 ∈ 𝑥 ↔ (𝑥 = ∅ ∨ ∃𝑦 𝑥 = {𝑦})) | |
11 | 10 | biimpri 231 | . . . . . . 7 ⊢ ((𝑥 = ∅ ∨ ∃𝑦 𝑥 = {𝑦}) → ∃*𝑧 𝑧 ∈ 𝑥) |
12 | 4, 9, 11 | 3syl 18 | . . . . . 6 ⊢ (𝑥 ∈ {∅, {∅}} → ∃*𝑧 𝑧 ∈ 𝑥) |
13 | df2o2 8196 | . . . . . 6 ⊢ 2o = {∅, {∅}} | |
14 | 12, 13 | eleq2s 2849 | . . . . 5 ⊢ (𝑥 ∈ 2o → ∃*𝑧 𝑧 ∈ 𝑥) |
15 | 14 | rgen 3061 | . . . 4 ⊢ ∀𝑥 ∈ 2o ∃*𝑧 𝑧 ∈ 𝑥 |
16 | 15 | a1i 11 | . . 3 ⊢ (⊤ → ∀𝑥 ∈ 2o ∃*𝑧 𝑧 ∈ 𝑥) |
17 | 1, 3, 16 | setcthin 45952 | . 2 ⊢ (⊤ → (SetCat‘2o) ∈ ThinCat) |
18 | 17 | mptru 1550 | 1 ⊢ (SetCat‘2o) ∈ ThinCat |
Colors of variables: wff setvar class |
Syntax hints: ∨ wo 847 = wceq 1543 ⊤wtru 1544 ∃wex 1787 ∈ wcel 2112 ∃*wmo 2537 ∀wral 3051 Vcvv 3398 ∅c0 4223 {csn 4527 {cpr 4529 ‘cfv 6358 2oc2o 8174 SetCatcsetc 17535 ThinCatcthinc 45916 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-10 2143 ax-11 2160 ax-12 2177 ax-ext 2708 ax-rep 5164 ax-sep 5177 ax-nul 5184 ax-pow 5243 ax-pr 5307 ax-un 7501 ax-cnex 10750 ax-resscn 10751 ax-1cn 10752 ax-icn 10753 ax-addcl 10754 ax-addrcl 10755 ax-mulcl 10756 ax-mulrcl 10757 ax-mulcom 10758 ax-addass 10759 ax-mulass 10760 ax-distr 10761 ax-i2m1 10762 ax-1ne0 10763 ax-1rid 10764 ax-rnegex 10765 ax-rrecex 10766 ax-cnre 10767 ax-pre-lttri 10768 ax-pre-lttrn 10769 ax-pre-ltadd 10770 ax-pre-mulgt0 10771 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3or 1090 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-nf 1792 df-sb 2073 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2728 df-clel 2809 df-nfc 2879 df-ne 2933 df-nel 3037 df-ral 3056 df-rex 3057 df-reu 3058 df-rmo 3059 df-rab 3060 df-v 3400 df-sbc 3684 df-csb 3799 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-pss 3872 df-nul 4224 df-if 4426 df-pw 4501 df-sn 4528 df-pr 4530 df-tp 4532 df-op 4534 df-uni 4806 df-iun 4892 df-br 5040 df-opab 5102 df-mpt 5121 df-tr 5147 df-id 5440 df-eprel 5445 df-po 5453 df-so 5454 df-fr 5494 df-we 5496 df-xp 5542 df-rel 5543 df-cnv 5544 df-co 5545 df-dm 5546 df-rn 5547 df-res 5548 df-ima 5549 df-pred 6140 df-ord 6194 df-on 6195 df-lim 6196 df-suc 6197 df-iota 6316 df-fun 6360 df-fn 6361 df-f 6362 df-f1 6363 df-fo 6364 df-f1o 6365 df-fv 6366 df-riota 7148 df-ov 7194 df-oprab 7195 df-mpo 7196 df-om 7623 df-1st 7739 df-2nd 7740 df-wrecs 8025 df-recs 8086 df-rdg 8124 df-1o 8180 df-2o 8181 df-er 8369 df-map 8488 df-en 8605 df-dom 8606 df-sdom 8607 df-fin 8608 df-pnf 10834 df-mnf 10835 df-xr 10836 df-ltxr 10837 df-le 10838 df-sub 11029 df-neg 11030 df-nn 11796 df-2 11858 df-3 11859 df-4 11860 df-5 11861 df-6 11862 df-7 11863 df-8 11864 df-9 11865 df-n0 12056 df-z 12142 df-dec 12259 df-uz 12404 df-fz 13061 df-struct 16668 df-ndx 16669 df-slot 16670 df-base 16672 df-hom 16773 df-cco 16774 df-cat 17125 df-cid 17126 df-setc 17536 df-thinc 45917 |
This theorem is referenced by: (None) |
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