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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 49952. (Contributed by Zhi Wang, 20-Sep-2024.) |
| Ref | Expression |
|---|---|
| setc2othin | ⊢ (SetCat‘2o) ∈ ThinCat |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqidd 2738 | . . 3 ⊢ (⊤ → (SetCat‘2o) = (SetCat‘2o)) | |
| 2 | 2oex 8409 | . . . 4 ⊢ 2o ∈ V | |
| 3 | 2 | a1i 11 | . . 3 ⊢ (⊤ → 2o ∈ V) |
| 4 | elpri 4592 | . . . . . . 7 ⊢ (𝑥 ∈ {∅, {∅}} → (𝑥 = ∅ ∨ 𝑥 = {∅})) | |
| 5 | 0ex 5242 | . . . . . . . . 9 ⊢ ∅ ∈ V | |
| 6 | sneq 4578 | . . . . . . . . . 10 ⊢ (𝑦 = ∅ → {𝑦} = {∅}) | |
| 7 | 6 | eqeq2d 2748 | . . . . . . . . 9 ⊢ (𝑦 = ∅ → (𝑥 = {𝑦} ↔ 𝑥 = {∅})) |
| 8 | 5, 7 | spcev 3549 | . . . . . . . 8 ⊢ (𝑥 = {∅} → ∃𝑦 𝑥 = {𝑦}) |
| 9 | 8 | orim2i 911 | . . . . . . 7 ⊢ ((𝑥 = ∅ ∨ 𝑥 = {∅}) → (𝑥 = ∅ ∨ ∃𝑦 𝑥 = {𝑦})) |
| 10 | mo0sn 49303 | . . . . . . . 8 ⊢ (∃*𝑧 𝑧 ∈ 𝑥 ↔ (𝑥 = ∅ ∨ ∃𝑦 𝑥 = {𝑦})) | |
| 11 | 10 | biimpri 228 | . . . . . . 7 ⊢ ((𝑥 = ∅ ∨ ∃𝑦 𝑥 = {𝑦}) → ∃*𝑧 𝑧 ∈ 𝑥) |
| 12 | 4, 9, 11 | 3syl 18 | . . . . . 6 ⊢ (𝑥 ∈ {∅, {∅}} → ∃*𝑧 𝑧 ∈ 𝑥) |
| 13 | df2o2 8407 | . . . . . 6 ⊢ 2o = {∅, {∅}} | |
| 14 | 12, 13 | eleq2s 2855 | . . . . 5 ⊢ (𝑥 ∈ 2o → ∃*𝑧 𝑧 ∈ 𝑥) |
| 15 | 14 | rgen 3054 | . . . 4 ⊢ ∀𝑥 ∈ 2o ∃*𝑧 𝑧 ∈ 𝑥 |
| 16 | 15 | a1i 11 | . . 3 ⊢ (⊤ → ∀𝑥 ∈ 2o ∃*𝑧 𝑧 ∈ 𝑥) |
| 17 | 1, 3, 16 | setcthin 49952 | . 2 ⊢ (⊤ → (SetCat‘2o) ∈ ThinCat) |
| 18 | 17 | mptru 1549 | 1 ⊢ (SetCat‘2o) ∈ ThinCat |
| Colors of variables: wff setvar class |
| Syntax hints: ∨ wo 848 = wceq 1542 ⊤wtru 1543 ∃wex 1781 ∈ wcel 2114 ∃*wmo 2538 ∀wral 3052 Vcvv 3430 ∅c0 4274 {csn 4568 {cpr 4570 ‘cfv 6492 2oc2o 8392 SetCatcsetc 18033 ThinCatcthinc 49904 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-cnex 11085 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 ax-pre-mulgt0 11106 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-tp 4573 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-1st 7935 df-2nd 7936 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-rdg 8342 df-1o 8398 df-2o 8399 df-er 8636 df-map 8768 df-en 8887 df-dom 8888 df-sdom 8889 df-fin 8890 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-nn 12166 df-2 12235 df-3 12236 df-4 12237 df-5 12238 df-6 12239 df-7 12240 df-8 12241 df-9 12242 df-n0 12429 df-z 12516 df-dec 12636 df-uz 12780 df-fz 13453 df-struct 17108 df-slot 17143 df-ndx 17155 df-base 17171 df-hom 17235 df-cco 17236 df-cat 17625 df-cid 17626 df-setc 18034 df-thinc 49905 |
| This theorem is referenced by: (None) |
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