| 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 2737 | . . 3 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 3 | subthinc.c | . . 3 ⊢ (𝜑 → 𝐶 ∈ ThinCat) | |
| 4 | subthinc.j | . . . 4 ⊢ (𝜑 → 𝐽 ∈ (Subcat‘𝐶)) | |
| 5 | eqidd 2738 | . . . 4 ⊢ (𝜑 → dom dom 𝐽 = dom dom 𝐽) | |
| 6 | 4, 5 | subcfn 17799 | . . 3 ⊢ (𝜑 → 𝐽 Fn (dom dom 𝐽 × dom dom 𝐽)) |
| 7 | 4, 6, 2 | subcss1 17800 | . . 3 ⊢ (𝜑 → dom dom 𝐽 ⊆ (Base‘𝐶)) |
| 8 | 1, 2, 3, 6, 7 | rescbas 17787 | . 2 ⊢ (𝜑 → dom dom 𝐽 = (Base‘𝐷)) |
| 9 | 1, 2, 3, 6, 7 | reschom 17788 | . 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 2737 | . . . . 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 17801 | . . . 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 3923 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → 𝑥 ∈ (Base‘𝐶)) |
| 19 | 17, 14 | sseldd 3923 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → 𝑦 ∈ (Base‘𝐶)) |
| 20 | 16, 18, 19, 2, 12 | thincmo 49915 | . . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → ∃*𝑓 𝑓 ∈ (𝑥(Hom ‘𝐶)𝑦)) |
| 21 | mosssn2 49304 | . . . . 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 3929 | . . . . 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 49304 | . . 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 17806 | . 2 ⊢ (𝜑 → 𝐷 ∈ Cat) |
| 29 | 8, 9, 27, 28 | isthincd 49923 | 1 ⊢ (𝜑 → 𝐷 ∈ ThinCat) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1542 ∃wex 1781 ∈ wcel 2114 ∃*wmo 2538 ⊆ wss 3890 {csn 4568 × cxp 5622 dom cdm 5624 Fn wfn 6487 ‘cfv 6492 (class class class)co 7360 Basecbs 17170 Hom chom 17222 ↾cat cresc 17766 Subcatcsubc 17767 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-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-er 8636 df-pm 8769 df-ixp 8839 df-en 8887 df-dom 8888 df-sdom 8889 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-sets 17125 df-slot 17143 df-ndx 17155 df-base 17171 df-ress 17192 df-hom 17235 df-cco 17236 df-cat 17625 df-cid 17626 df-homf 17627 df-ssc 17768 df-resc 17769 df-subc 17770 df-thinc 49905 |
| This theorem is referenced by: (None) |
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