| Mathbox for Zhi Wang |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > subthinc | Structured version Visualization version GIF version | ||
| Description: A subcategory of a thin category is thin. (Contributed by Zhi Wang, 30-Sep-2024.) |
| Ref | Expression |
|---|---|
| subthinc.1 | ⊢ 𝐷 = (𝐶 ↾cat 𝐽) |
| subthinc.j | ⊢ (𝜑 → 𝐽 ∈ (Subcat‘𝐶)) |
| subthinc.c | ⊢ (𝜑 → 𝐶 ∈ ThinCat) |
| Ref | Expression |
|---|---|
| subthinc | ⊢ (𝜑 → 𝐷 ∈ ThinCat) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | subthinc.1 | . . 3 ⊢ 𝐷 = (𝐶 ↾cat 𝐽) | |
| 2 | eqid 2736 | . . 3 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 3 | subthinc.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ ThinCat) | |
| 4 | subthinc.j | . . . 4 ⊢ (𝜑 → 𝐽 ∈ (Subcat‘𝐶)) | |
| 5 | eqidd 2737 | . . . 4 ⊢ (𝜑 → dom dom 𝐽 = dom dom 𝐽) | |
| 6 | 4, 5 | subcfn 17808 | . . 3 ⊢ (𝜑 → 𝐽 Fn (dom dom 𝐽 × dom dom 𝐽)) |
| 7 | 4, 6, 2 | subcss1 17809 | . . 3 ⊢ (𝜑 → dom dom 𝐽 ⊆ (Base‘𝐶)) |
| 8 | 1, 2, 3, 6, 7 | rescbas 17796 | . 2 ⊢ (𝜑 → dom dom 𝐽 = (Base‘𝐷)) |
| 9 | 1, 2, 3, 6, 7 | reschom 17797 | . 2 ⊢ (𝜑 → 𝐽 = (Hom ‘𝐷)) |
| 10 | 4 | adantr 480 | . . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → 𝐽 ∈ (Subcat‘𝐶)) |
| 11 | 6 | adantr 480 | . . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → 𝐽 Fn (dom dom 𝐽 × dom dom 𝐽)) |
| 12 | eqid 2736 | . . . . 5 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶) | |
| 13 | simprl 771 | . . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → 𝑥 ∈ dom dom 𝐽) | |
| 14 | simprr 773 | . . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → 𝑦 ∈ dom dom 𝐽) | |
| 15 | 10, 11, 12, 13, 14 | subcss2 17810 | . . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → (𝑥𝐽𝑦) ⊆ (𝑥(Hom ‘𝐶)𝑦)) |
| 16 | 3 | adantr 480 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → 𝐶 ∈ ThinCat) |
| 17 | 7 | adantr 480 | . . . . . . 7 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → dom dom 𝐽 ⊆ (Base‘𝐶)) |
| 18 | 17, 13 | sseldd 3922 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → 𝑥 ∈ (Base‘𝐶)) |
| 19 | 17, 14 | sseldd 3922 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → 𝑦 ∈ (Base‘𝐶)) |
| 20 | 16, 18, 19, 2, 12 | thincmo 49903 | . . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → ∃*𝑓 𝑓 ∈ (𝑥(Hom ‘𝐶)𝑦)) |
| 21 | mosssn2 49292 | . . . . 5 ⊢ (∃*𝑓 𝑓 ∈ (𝑥(Hom ‘𝐶)𝑦) ↔ ∃𝑓(𝑥(Hom ‘𝐶)𝑦) ⊆ {𝑓}) | |
| 22 | 20, 21 | sylib 218 | . . . 4 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → ∃𝑓(𝑥(Hom ‘𝐶)𝑦) ⊆ {𝑓}) |
| 23 | sstr2 3928 | . . . . 5 ⊢ ((𝑥𝐽𝑦) ⊆ (𝑥(Hom ‘𝐶)𝑦) → ((𝑥(Hom ‘𝐶)𝑦) ⊆ {𝑓} → (𝑥𝐽𝑦) ⊆ {𝑓})) | |
| 24 | 23 | eximdv 1919 | . . . 4 ⊢ ((𝑥𝐽𝑦) ⊆ (𝑥(Hom ‘𝐶)𝑦) → (∃𝑓(𝑥(Hom ‘𝐶)𝑦) ⊆ {𝑓} → ∃𝑓(𝑥𝐽𝑦) ⊆ {𝑓})) |
| 25 | 15, 22, 24 | sylc 65 | . . 3 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → ∃𝑓(𝑥𝐽𝑦) ⊆ {𝑓}) |
| 26 | mosssn2 49292 | . . 3 ⊢ (∃*𝑓 𝑓 ∈ (𝑥𝐽𝑦) ↔ ∃𝑓(𝑥𝐽𝑦) ⊆ {𝑓}) | |
| 27 | 25, 26 | sylibr 234 | . 2 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → ∃*𝑓 𝑓 ∈ (𝑥𝐽𝑦)) |
| 28 | 1, 4 | subccat 17815 | . 2 ⊢ (𝜑 → 𝐷 ∈ Cat) |
| 29 | 8, 9, 27, 28 | isthincd 49911 | 1 ⊢ (𝜑 → 𝐷 ∈ ThinCat) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∃wex 1781 ∈ wcel 2114 ∃*wmo 2537 ⊆ wss 3889 {csn 4567 × cxp 5629 dom cdm 5631 Fn wfn 6493 ‘cfv 6498 (class class class)co 7367 Basecbs 17179 Hom chom 17231 ↾cat cresc 17775 Subcatcsubc 17776 ThinCatcthinc 49892 |
| 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 2708 ax-rep 5212 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-cnex 11094 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| 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 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-1st 7942 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-er 8643 df-pm 8776 df-ixp 8846 df-en 8894 df-dom 8895 df-sdom 8896 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-nn 12175 df-2 12244 df-3 12245 df-4 12246 df-5 12247 df-6 12248 df-7 12249 df-8 12250 df-9 12251 df-n0 12438 df-z 12525 df-dec 12645 df-sets 17134 df-slot 17152 df-ndx 17164 df-base 17180 df-ress 17201 df-hom 17244 df-cco 17245 df-cat 17634 df-cid 17635 df-homf 17636 df-ssc 17777 df-resc 17778 df-subc 17779 df-thinc 49893 |
| This theorem is referenced by: (None) |
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