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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 50050. (Contributed by Zhi Wang, 20-Sep-2024.) |
| Ref | Expression |
|---|---|
| setc2othin | ⊢ (SetCat‘2o) ∈ ThinCat |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqidd 2762 | . . 3 ⊢ (⊤ → (SetCat‘2o) = (SetCat‘2o)) | |
| 2 | 2oex 8444 | . . . 4 ⊢ 2o ∈ V | |
| 3 | 2 | a1i 11 | . . 3 ⊢ (⊤ → 2o ∈ V) |
| 4 | elpri 4605 | . . . . . . 7 ⊢ (𝑥 ∈ {∅, {∅}} → (𝑥 = ∅ ∨ 𝑥 = {∅})) | |
| 5 | 0ex 5256 | . . . . . . . . 9 ⊢ ∅ ∈ V | |
| 6 | sneq 4591 | . . . . . . . . . 10 ⊢ (𝑦 = ∅ → {𝑦} = {∅}) | |
| 7 | 6 | eqeq2d 2772 | . . . . . . . . 9 ⊢ (𝑦 = ∅ → (𝑥 = {𝑦} ↔ 𝑥 = {∅})) |
| 8 | 5, 7 | spcev 3565 | . . . . . . . 8 ⊢ (𝑥 = {∅} → ∃𝑦 𝑥 = {𝑦}) |
| 9 | 8 | orim2i 921 | . . . . . . 7 ⊢ ((𝑥 = ∅ ∨ 𝑥 = {∅}) → (𝑥 = ∅ ∨ ∃𝑦 𝑥 = {𝑦})) |
| 10 | mo0sn 49401 | . . . . . . . 8 ⊢ (∃*𝑧 𝑧 ∈ 𝑥 ↔ (𝑥 = ∅ ∨ ∃𝑦 𝑥 = {𝑦})) | |
| 11 | 10 | biimpri 230 | . . . . . . 7 ⊢ ((𝑥 = ∅ ∨ ∃𝑦 𝑥 = {𝑦}) → ∃*𝑧 𝑧 ∈ 𝑥) |
| 12 | 4, 9, 11 | 3syl 18 | . . . . . 6 ⊢ (𝑥 ∈ {∅, {∅}} → ∃*𝑧 𝑧 ∈ 𝑥) |
| 13 | df2o2 8441 | . . . . . 6 ⊢ 2o = {∅, {∅}} | |
| 14 | 12, 13 | eleq2s 2879 | . . . . 5 ⊢ (𝑥 ∈ 2o → ∃*𝑧 𝑧 ∈ 𝑥) |
| 15 | 14 | rgen 3077 | . . . 4 ⊢ ∀𝑥 ∈ 2o ∃*𝑧 𝑧 ∈ 𝑥 |
| 16 | 15 | a1i 11 | . . 3 ⊢ (⊤ → ∀𝑥 ∈ 2o ∃*𝑧 𝑧 ∈ 𝑥) |
| 17 | 1, 3, 16 | setcthin 50050 | . 2 ⊢ (⊤ → (SetCat‘2o) ∈ ThinCat) |
| 18 | 17 | mptru 1566 | 1 ⊢ (SetCat‘2o) ∈ ThinCat |
| Colors of variables: wff setvar class |
| Syntax hints: ∨ wo 858 = wceq 1559 ⊤wtru 1560 ∃wex 1798 ∈ wcel 2141 ∃*wmo 2563 ∀wral 3075 Vcvv 3453 ∅c0 4285 {csn 4581 {cpr 4583 ‘cfv 6517 2oc2o 8426 SetCatcsetc 18091 ThinCatcthinc 50002 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-rep 5226 ax-sep 5245 ax-nul 5255 ax-pow 5321 ax-pr 5389 ax-un 7714 ax-cnex 11126 ax-resscn 11127 ax-1cn 11128 ax-icn 11129 ax-addcl 11130 ax-addrcl 11131 ax-mulcl 11132 ax-mulrcl 11133 ax-mulcom 11134 ax-addass 11135 ax-mulass 11136 ax-distr 11137 ax-i2m1 11138 ax-1ne0 11139 ax-1rid 11140 ax-rnegex 11141 ax-rrecex 11142 ax-cnre 11143 ax-pre-lttri 11144 ax-pre-lttrn 11145 ax-pre-ltadd 11146 ax-pre-mulgt0 11147 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4582 df-pr 4584 df-tp 4586 df-op 4588 df-uni 4865 df-iun 4950 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5540 df-eprel 5545 df-po 5553 df-so 5554 df-fr 5598 df-we 5600 df-xp 5651 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 df-pred 6284 df-ord 6345 df-on 6346 df-lim 6347 df-suc 6348 df-iota 6473 df-fun 6519 df-fn 6520 df-f 6521 df-f1 6522 df-fo 6523 df-f1o 6524 df-fv 6525 df-riota 7349 df-ov 7395 df-oprab 7396 df-mpo 7397 df-om 7843 df-1st 7966 df-2nd 7967 df-frecs 8257 df-wrecs 8288 df-recs 8337 df-rdg 8376 df-1o 8432 df-2o 8433 df-er 8673 df-map 8805 df-en 8924 df-dom 8925 df-sdom 8926 df-fin 8927 df-pnf 11215 df-mnf 11216 df-xr 11217 df-ltxr 11218 df-le 11219 df-sub 11413 df-neg 11414 df-nn 12208 df-2 12277 df-3 12278 df-4 12279 df-5 12280 df-6 12281 df-7 12282 df-8 12283 df-9 12284 df-n0 12479 df-z 12566 df-dec 12686 df-uz 12837 df-fz 13510 df-struct 17166 df-slot 17201 df-ndx 17213 df-base 17229 df-hom 17293 df-cco 17294 df-cat 17683 df-cid 17684 df-setc 18092 df-thinc 50003 |
| This theorem is referenced by: (None) |
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