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| Mirrors > Home > MPE Home > Th. List > Mathboxes > thincciso4 | Structured version Visualization version GIF version | ||
| Description: Two isomorphic categories are either both thin or neither. Note that "thincciso2.u" is redundant thanks to elbasfv 17274. (Contributed by Zhi Wang, 18-Oct-2025.) |
| Ref | Expression |
|---|---|
| thincciso2.c | ⊢ 𝐶 = (CatCat‘𝑈) |
| thincciso2.b | ⊢ 𝐵 = (Base‘𝐶) |
| thincciso2.u | ⊢ (𝜑 → 𝑈 ∈ 𝑉) |
| thincciso2.x | ⊢ (𝜑 → 𝑋 ∈ 𝐵) |
| thincciso2.y | ⊢ (𝜑 → 𝑌 ∈ 𝐵) |
| thincciso4.i | ⊢ (𝜑 → 𝑋( ≃𝑐 ‘𝐶)𝑌) |
| Ref | Expression |
|---|---|
| thincciso4 | ⊢ (𝜑 → (𝑋 ∈ ThinCat ↔ 𝑌 ∈ ThinCat)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | thincciso4.i | . . . . 5 ⊢ (𝜑 → 𝑋( ≃𝑐 ‘𝐶)𝑌) | |
| 2 | eqid 2769 | . . . . . 6 ⊢ (Iso‘𝐶) = (Iso‘𝐶) | |
| 3 | thincciso2.b | . . . . . 6 ⊢ 𝐵 = (Base‘𝐶) | |
| 4 | thincciso2.u | . . . . . . 7 ⊢ (𝜑 → 𝑈 ∈ 𝑉) | |
| 5 | thincciso2.c | . . . . . . . 8 ⊢ 𝐶 = (CatCat‘𝑈) | |
| 6 | 5 | catccat 18164 | . . . . . . 7 ⊢ (𝑈 ∈ 𝑉 → 𝐶 ∈ Cat) |
| 7 | 4, 6 | syl 18 | . . . . . 6 ⊢ (𝜑 → 𝐶 ∈ Cat) |
| 8 | thincciso2.x | . . . . . 6 ⊢ (𝜑 → 𝑋 ∈ 𝐵) | |
| 9 | thincciso2.y | . . . . . 6 ⊢ (𝜑 → 𝑌 ∈ 𝐵) | |
| 10 | 2, 3, 7, 8, 9 | cic 17855 | . . . . 5 ⊢ (𝜑 → (𝑋( ≃𝑐 ‘𝐶)𝑌 ↔ ∃𝑓 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌))) |
| 11 | 1, 10 | mpbid 235 | . . . 4 ⊢ (𝜑 → ∃𝑓 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) |
| 12 | 11 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ 𝑋 ∈ ThinCat) → ∃𝑓 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) |
| 13 | 4 | ad2antrr 738 | . . . 4 ⊢ (((𝜑 ∧ 𝑋 ∈ ThinCat) ∧ 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) → 𝑈 ∈ 𝑉) |
| 14 | 8 | ad2antrr 738 | . . . 4 ⊢ (((𝜑 ∧ 𝑋 ∈ ThinCat) ∧ 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) → 𝑋 ∈ 𝐵) |
| 15 | 9 | ad2antrr 738 | . . . 4 ⊢ (((𝜑 ∧ 𝑋 ∈ ThinCat) ∧ 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) → 𝑌 ∈ 𝐵) |
| 16 | simpr 489 | . . . 4 ⊢ (((𝜑 ∧ 𝑋 ∈ ThinCat) ∧ 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) → 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) | |
| 17 | simplr 780 | . . . 4 ⊢ (((𝜑 ∧ 𝑋 ∈ ThinCat) ∧ 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) → 𝑋 ∈ ThinCat) | |
| 18 | 5, 3, 13, 14, 15, 2, 16, 17 | thincciso3 50118 | . . 3 ⊢ (((𝜑 ∧ 𝑋 ∈ ThinCat) ∧ 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) → 𝑌 ∈ ThinCat) |
| 19 | 12, 18 | exlimddv 1962 | . 2 ⊢ ((𝜑 ∧ 𝑋 ∈ ThinCat) → 𝑌 ∈ ThinCat) |
| 20 | 11 | adantr 485 | . . 3 ⊢ ((𝜑 ∧ 𝑌 ∈ ThinCat) → ∃𝑓 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) |
| 21 | 4 | ad2antrr 738 | . . . 4 ⊢ (((𝜑 ∧ 𝑌 ∈ ThinCat) ∧ 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) → 𝑈 ∈ 𝑉) |
| 22 | 8 | ad2antrr 738 | . . . 4 ⊢ (((𝜑 ∧ 𝑌 ∈ ThinCat) ∧ 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) → 𝑋 ∈ 𝐵) |
| 23 | 9 | ad2antrr 738 | . . . 4 ⊢ (((𝜑 ∧ 𝑌 ∈ ThinCat) ∧ 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) → 𝑌 ∈ 𝐵) |
| 24 | simpr 489 | . . . 4 ⊢ (((𝜑 ∧ 𝑌 ∈ ThinCat) ∧ 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) → 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) | |
| 25 | simplr 780 | . . . 4 ⊢ (((𝜑 ∧ 𝑌 ∈ ThinCat) ∧ 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) → 𝑌 ∈ ThinCat) | |
| 26 | 5, 3, 21, 22, 23, 2, 24, 25 | thincciso2 50117 | . . 3 ⊢ (((𝜑 ∧ 𝑌 ∈ ThinCat) ∧ 𝑓 ∈ (𝑋(Iso‘𝐶)𝑌)) → 𝑋 ∈ ThinCat) |
| 27 | 20, 26 | exlimddv 1962 | . 2 ⊢ ((𝜑 ∧ 𝑌 ∈ ThinCat) → 𝑋 ∈ ThinCat) |
| 28 | 19, 27 | impbida 812 | 1 ⊢ (𝜑 → (𝑋 ∈ ThinCat ↔ 𝑌 ∈ ThinCat)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1567 ∃wex 1806 ∈ wcel 2149 class class class wbr 5113 ‘cfv 6537 (class class class)co 7411 Basecbs 17268 Catccat 17719 Isociso 17802 ≃𝑐 ccic 17851 CatCatccatc 18154 ThinCatcthinc 50079 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-rep 5242 ax-sep 5261 ax-nul 5271 ax-pow 5337 ax-pr 5405 ax-un 7733 ax-cnex 11155 ax-resscn 11156 ax-1cn 11157 ax-icn 11158 ax-addcl 11159 ax-addrcl 11160 ax-mulcl 11161 ax-mulrcl 11162 ax-mulcom 11163 ax-addass 11164 ax-mulass 11165 ax-distr 11166 ax-i2m1 11167 ax-1ne0 11168 ax-1rid 11169 ax-rnegex 11170 ax-rrecex 11171 ax-cnre 11172 ax-pre-lttri 11173 ax-pre-lttrn 11174 ax-pre-ltadd 11175 ax-pre-mulgt0 11176 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4493 df-pw 4569 df-sn 4595 df-pr 4597 df-tp 4599 df-op 4601 df-uni 4877 df-iun 4962 df-br 5114 df-opab 5178 df-mpt 5197 df-tr 5223 df-id 5557 df-eprel 5562 df-po 5570 df-so 5571 df-fr 5615 df-we 5617 df-xp 5668 df-rel 5669 df-cnv 5670 df-co 5671 df-dm 5672 df-rn 5673 df-res 5674 df-ima 5675 df-pred 6303 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6493 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-riota 7368 df-ov 7414 df-oprab 7415 df-mpo 7416 df-om 7862 df-1st 7985 df-2nd 7986 df-supp 8156 df-frecs 8277 df-wrecs 8308 df-recs 8357 df-rdg 8396 df-1o 8452 df-er 8693 df-map 8825 df-ixp 8895 df-en 8943 df-dom 8944 df-sdom 8945 df-fin 8946 df-pnf 11244 df-mnf 11245 df-xr 11246 df-ltxr 11247 df-le 11248 df-sub 11442 df-neg 11443 df-nn 12233 df-2 12302 df-3 12303 df-4 12304 df-5 12305 df-6 12306 df-7 12307 df-8 12308 df-9 12309 df-n0 12504 df-z 12591 df-dec 12711 df-uz 12862 df-fz 13535 df-struct 17206 df-slot 17241 df-ndx 17253 df-base 17269 df-hom 17333 df-cco 17334 df-cat 17723 df-cid 17724 df-sect 17803 df-inv 17804 df-iso 17805 df-cic 17852 df-func 17914 df-idfu 17915 df-cofu 17916 df-full 17962 df-fth 17963 df-catc 18155 df-thinc 50080 |
| This theorem is referenced by: termcterm2 50176 |
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