| 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 17765 | . . 3 ⊢ (𝜑 → 𝐽 Fn (dom dom 𝐽 × dom dom 𝐽)) |
| 7 | 4, 6, 2 | subcss1 17766 | . . 3 ⊢ (𝜑 → dom dom 𝐽 ⊆ (Base‘𝐶)) |
| 8 | 1, 2, 3, 6, 7 | rescbas 17753 | . 2 ⊢ (𝜑 → dom dom 𝐽 = (Base‘𝐷)) |
| 9 | 1, 2, 3, 6, 7 | reschom 17754 | . 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 770 | . . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → 𝑥 ∈ dom dom 𝐽) | |
| 14 | simprr 772 | . . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → 𝑦 ∈ dom dom 𝐽) | |
| 15 | 10, 11, 12, 13, 14 | subcss2 17767 | . . . 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 3934 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → 𝑥 ∈ (Base‘𝐶)) |
| 19 | 17, 14 | sseldd 3934 | . . . . . 6 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → 𝑦 ∈ (Base‘𝐶)) |
| 20 | 16, 18, 19, 2, 12 | thincmo 49669 | . . . . 5 ⊢ ((𝜑 ∧ (𝑥 ∈ dom dom 𝐽 ∧ 𝑦 ∈ dom dom 𝐽)) → ∃*𝑓 𝑓 ∈ (𝑥(Hom ‘𝐶)𝑦)) |
| 21 | mosssn2 49058 | . . . . 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 3940 | . . . . 5 ⊢ ((𝑥𝐽𝑦) ⊆ (𝑥(Hom ‘𝐶)𝑦) → ((𝑥(Hom ‘𝐶)𝑦) ⊆ {𝑓} → (𝑥𝐽𝑦) ⊆ {𝑓})) | |
| 24 | 23 | eximdv 1918 | . . . 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 49058 | . . 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 17772 | . 2 ⊢ (𝜑 → 𝐷 ∈ Cat) |
| 29 | 8, 9, 27, 28 | isthincd 49677 | 1 ⊢ (𝜑 → 𝐷 ∈ ThinCat) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∃wex 1780 ∈ wcel 2113 ∃*wmo 2537 ⊆ wss 3901 {csn 4580 × cxp 5622 dom cdm 5624 Fn wfn 6487 ‘cfv 6492 (class class class)co 7358 Basecbs 17136 Hom chom 17188 ↾cat cresc 17732 Subcatcsubc 17733 ThinCatcthinc 49658 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-rep 5224 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 ax-cnex 11082 ax-resscn 11083 ax-1cn 11084 ax-icn 11085 ax-addcl 11086 ax-addrcl 11087 ax-mulcl 11088 ax-mulrcl 11089 ax-mulcom 11090 ax-addass 11091 ax-mulass 11092 ax-distr 11093 ax-i2m1 11094 ax-1ne0 11095 ax-1rid 11096 ax-rnegex 11097 ax-rrecex 11098 ax-cnre 11099 ax-pre-lttri 11100 ax-pre-lttrn 11101 ax-pre-ltadd 11102 ax-pre-mulgt0 11103 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 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 3061 df-rmo 3350 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-pss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-iun 4948 df-br 5099 df-opab 5161 df-mpt 5180 df-tr 5206 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 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7809 df-1st 7933 df-2nd 7934 df-frecs 8223 df-wrecs 8254 df-recs 8303 df-rdg 8341 df-er 8635 df-pm 8766 df-ixp 8836 df-en 8884 df-dom 8885 df-sdom 8886 df-pnf 11168 df-mnf 11169 df-xr 11170 df-ltxr 11171 df-le 11172 df-sub 11366 df-neg 11367 df-nn 12146 df-2 12208 df-3 12209 df-4 12210 df-5 12211 df-6 12212 df-7 12213 df-8 12214 df-9 12215 df-n0 12402 df-z 12489 df-dec 12608 df-sets 17091 df-slot 17109 df-ndx 17121 df-base 17137 df-ress 17158 df-hom 17201 df-cco 17202 df-cat 17591 df-cid 17592 df-homf 17593 df-ssc 17734 df-resc 17735 df-subc 17736 df-thinc 49659 |
| This theorem is referenced by: (None) |
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