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| Mirrors > Home > MPE Home > Th. List > Mathboxes > setcthin | Structured version Visualization version GIF version | ||
| Description: A category of sets all of whose objects contain at most one element is thin. (Contributed by Zhi Wang, 20-Sep-2024.) |
| Ref | Expression |
|---|---|
| setcthin.c | ⊢ (𝜑 → 𝐶 = (SetCat‘𝑈)) |
| setcthin.u | ⊢ (𝜑 → 𝑈 ∈ 𝑉) |
| setcthin.x | ⊢ (𝜑 → ∀𝑥 ∈ 𝑈 ∃*𝑝 𝑝 ∈ 𝑥) |
| Ref | Expression |
|---|---|
| setcthin | ⊢ (𝜑 → 𝐶 ∈ ThinCat) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | setcthin.c | . 2 ⊢ (𝜑 → 𝐶 = (SetCat‘𝑈)) | |
| 2 | eqid 2739 | . . . 4 ⊢ (SetCat‘𝑈) = (SetCat‘𝑈) | |
| 3 | setcthin.u | . . . 4 ⊢ (𝜑 → 𝑈 ∈ 𝑉) | |
| 4 | 2, 3 | setcbas 18036 | . . 3 ⊢ (𝜑 → 𝑈 = (Base‘(SetCat‘𝑈))) |
| 5 | eqidd 2740 | . . 3 ⊢ (𝜑 → (Hom ‘(SetCat‘𝑈)) = (Hom ‘(SetCat‘𝑈))) | |
| 6 | elequ2 2134 | . . . . . . 7 ⊢ (𝑥 = 𝑧 → (𝑝 ∈ 𝑥 ↔ 𝑝 ∈ 𝑧)) | |
| 7 | 6 | mobidv 2553 | . . . . . 6 ⊢ (𝑥 = 𝑧 → (∃*𝑝 𝑝 ∈ 𝑥 ↔ ∃*𝑝 𝑝 ∈ 𝑧)) |
| 8 | setcthin.x | . . . . . . 7 ⊢ (𝜑 → ∀𝑥 ∈ 𝑈 ∃*𝑝 𝑝 ∈ 𝑥) | |
| 9 | 8 | adantr 481 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝑈 ∧ 𝑧 ∈ 𝑈)) → ∀𝑥 ∈ 𝑈 ∃*𝑝 𝑝 ∈ 𝑥) |
| 10 | simprr 778 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝑈 ∧ 𝑧 ∈ 𝑈)) → 𝑧 ∈ 𝑈) | |
| 11 | 7, 9, 10 | rspcdva 3561 | . . . . 5 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝑈 ∧ 𝑧 ∈ 𝑈)) → ∃*𝑝 𝑝 ∈ 𝑧) |
| 12 | mofmo 49337 | . . . . 5 ⊢ (∃*𝑝 𝑝 ∈ 𝑧 → ∃*𝑓 𝑓:𝑦⟶𝑧) | |
| 13 | 11, 12 | syl 17 | . . . 4 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝑈 ∧ 𝑧 ∈ 𝑈)) → ∃*𝑓 𝑓:𝑦⟶𝑧) |
| 14 | 3 | adantr 481 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝑈 ∧ 𝑧 ∈ 𝑈)) → 𝑈 ∈ 𝑉) |
| 15 | eqid 2739 | . . . . . 6 ⊢ (Hom ‘(SetCat‘𝑈)) = (Hom ‘(SetCat‘𝑈)) | |
| 16 | simprl 776 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝑈 ∧ 𝑧 ∈ 𝑈)) → 𝑦 ∈ 𝑈) | |
| 17 | 2, 14, 15, 16, 10 | elsetchom 18039 | . . . . 5 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝑈 ∧ 𝑧 ∈ 𝑈)) → (𝑓 ∈ (𝑦(Hom ‘(SetCat‘𝑈))𝑧) ↔ 𝑓:𝑦⟶𝑧)) |
| 18 | 17 | mobidv 2553 | . . . 4 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝑈 ∧ 𝑧 ∈ 𝑈)) → (∃*𝑓 𝑓 ∈ (𝑦(Hom ‘(SetCat‘𝑈))𝑧) ↔ ∃*𝑓 𝑓:𝑦⟶𝑧)) |
| 19 | 13, 18 | mpbird 258 | . . 3 ⊢ ((𝜑 ∧ (𝑦 ∈ 𝑈 ∧ 𝑧 ∈ 𝑈)) → ∃*𝑓 𝑓 ∈ (𝑦(Hom ‘(SetCat‘𝑈))𝑧)) |
| 20 | 2 | setccat 18043 | . . . 4 ⊢ (𝑈 ∈ 𝑉 → (SetCat‘𝑈) ∈ Cat) |
| 21 | 3, 20 | syl 17 | . . 3 ⊢ (𝜑 → (SetCat‘𝑈) ∈ Cat) |
| 22 | 4, 5, 19, 21 | isthincd 49926 | . 2 ⊢ (𝜑 → (SetCat‘𝑈) ∈ ThinCat) |
| 23 | 1, 22 | eqeltrd 2839 | 1 ⊢ (𝜑 → 𝐶 ∈ ThinCat) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 396 = wceq 1547 ∈ wcel 2119 ∃*wmo 2541 ∀wral 3053 ⟶wf 6481 ‘cfv 6485 (class class class)co 7356 Hom chom 17222 Catccat 17621 SetCatcsetc 18033 ThinCatcthinc 49907 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-rep 5199 ax-sep 5218 ax-nul 5228 ax-pow 5294 ax-pr 5362 ax-un 7678 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 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-rmo 3344 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-tp 4560 df-op 4562 df-uni 4839 df-iun 4923 df-br 5073 df-opab 5135 df-mpt 5154 df-tr 5180 df-id 5513 df-eprel 5518 df-po 5526 df-so 5527 df-fr 5571 df-we 5573 df-xp 5624 df-rel 5625 df-cnv 5626 df-co 5627 df-dm 5628 df-rn 5629 df-res 5630 df-ima 5631 df-pred 6252 df-ord 6313 df-on 6314 df-lim 6315 df-suc 6316 df-iota 6441 df-fun 6487 df-fn 6488 df-f 6489 df-f1 6490 df-fo 6491 df-f1o 6492 df-fv 6493 df-riota 7313 df-ov 7359 df-oprab 7360 df-mpo 7361 df-om 7807 df-1st 7931 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-1o 8395 df-er 8633 df-map 8765 df-en 8884 df-dom 8885 df-sdom 8886 df-fin 8887 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 49908 |
| This theorem is referenced by: setc2othin 49956 setcsnterm 49980 |
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