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| Mirrors > Home > MPE Home > Th. List > rhmsubcrngc | Structured version Visualization version GIF version | ||
| Description: The unital ring homomorphisms between unital rings (in a universe) are a subcategory of the category of non-unital rings. (Contributed by AV, 12-Mar-2020.) |
| Ref | Expression |
|---|---|
| rhmsubcrngc.c | ⊢ 𝐶 = (RngCat‘𝑈) |
| rhmsubcrngc.u | ⊢ (𝜑 → 𝑈 ∈ 𝑉) |
| rhmsubcrngc.b | ⊢ (𝜑 → 𝐵 = (Ring ∩ 𝑈)) |
| rhmsubcrngc.h | ⊢ (𝜑 → 𝐻 = ( RingHom ↾ (𝐵 × 𝐵))) |
| Ref | Expression |
|---|---|
| rhmsubcrngc | ⊢ (𝜑 → 𝐻 ∈ (Subcat‘𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rhmsubcrngc.u | . . . . 5 ⊢ (𝜑 → 𝑈 ∈ 𝑉) | |
| 2 | rhmsubcrngc.b | . . . . 5 ⊢ (𝜑 → 𝐵 = (Ring ∩ 𝑈)) | |
| 3 | eqid 2760 | . . . . . . 7 ⊢ (RngCat‘𝑈) = (RngCat‘𝑈) | |
| 4 | eqid 2760 | . . . . . . 7 ⊢ (Base‘(RngCat‘𝑈)) = (Base‘(RngCat‘𝑈)) | |
| 5 | 3, 4, 1 | rngcbas 20786 | . . . . . 6 ⊢ (𝜑 → (Base‘(RngCat‘𝑈)) = (𝑈 ∩ Rng)) |
| 6 | incom 4155 | . . . . . 6 ⊢ (𝑈 ∩ Rng) = (Rng ∩ 𝑈) | |
| 7 | 5, 6 | eqtrdi 2811 | . . . . 5 ⊢ (𝜑 → (Base‘(RngCat‘𝑈)) = (Rng ∩ 𝑈)) |
| 8 | 1, 2, 7 | rhmsscrnghm 20830 | . . . 4 ⊢ (𝜑 → ( RingHom ↾ (𝐵 × 𝐵)) ⊆cat ( RngHom ↾ ((Base‘(RngCat‘𝑈)) × (Base‘(RngCat‘𝑈))))) |
| 9 | rhmsubcrngc.c | . . . . . . . 8 ⊢ 𝐶 = (RngCat‘𝑈) | |
| 10 | 9 | a1i 11 | . . . . . . 7 ⊢ (𝜑 → 𝐶 = (RngCat‘𝑈)) |
| 11 | 10 | fveq2d 6883 | . . . . . 6 ⊢ (𝜑 → (Base‘𝐶) = (Base‘(RngCat‘𝑈))) |
| 12 | 11 | sqxpeqd 5687 | . . . . 5 ⊢ (𝜑 → ((Base‘𝐶) × (Base‘𝐶)) = ((Base‘(RngCat‘𝑈)) × (Base‘(RngCat‘𝑈)))) |
| 13 | 12 | reseq2d 5972 | . . . 4 ⊢ (𝜑 → ( RngHom ↾ ((Base‘𝐶) × (Base‘𝐶))) = ( RngHom ↾ ((Base‘(RngCat‘𝑈)) × (Base‘(RngCat‘𝑈))))) |
| 14 | 8, 13 | breqtrrd 5133 | . . 3 ⊢ (𝜑 → ( RingHom ↾ (𝐵 × 𝐵)) ⊆cat ( RngHom ↾ ((Base‘𝐶) × (Base‘𝐶)))) |
| 15 | rhmsubcrngc.h | . . 3 ⊢ (𝜑 → 𝐻 = ( RingHom ↾ (𝐵 × 𝐵))) | |
| 16 | eqid 2760 | . . . . 5 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 17 | 9, 16, 1 | rngchomfeqhom 20790 | . . . 4 ⊢ (𝜑 → (Homf ‘𝐶) = (Hom ‘𝐶)) |
| 18 | eqid 2760 | . . . . 5 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶) | |
| 19 | 9, 16, 1, 18 | rngchomfval 20787 | . . . 4 ⊢ (𝜑 → (Hom ‘𝐶) = ( RngHom ↾ ((Base‘𝐶) × (Base‘𝐶)))) |
| 20 | 17, 19 | eqtrd 2795 | . . 3 ⊢ (𝜑 → (Homf ‘𝐶) = ( RngHom ↾ ((Base‘𝐶) × (Base‘𝐶)))) |
| 21 | 14, 15, 20 | 3brtr4d 5137 | . 2 ⊢ (𝜑 → 𝐻 ⊆cat (Homf ‘𝐶)) |
| 22 | 9, 1, 2, 15 | rhmsubcrngclem1 20831 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ((Id‘𝐶)‘𝑥) ∈ (𝑥𝐻𝑥)) |
| 23 | 9, 1, 2, 15 | rhmsubcrngclem2 20832 | . . . 4 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 ∀𝑓 ∈ (𝑥𝐻𝑦)∀𝑔 ∈ (𝑦𝐻𝑧)(𝑔(〈𝑥, 𝑦〉(comp‘𝐶)𝑧)𝑓) ∈ (𝑥𝐻𝑧)) |
| 24 | 22, 23 | jca 521 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵) → (((Id‘𝐶)‘𝑥) ∈ (𝑥𝐻𝑥) ∧ ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 ∀𝑓 ∈ (𝑥𝐻𝑦)∀𝑔 ∈ (𝑦𝐻𝑧)(𝑔(〈𝑥, 𝑦〉(comp‘𝐶)𝑧)𝑓) ∈ (𝑥𝐻𝑧))) |
| 25 | 24 | ralrimiva 3154 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐵 (((Id‘𝐶)‘𝑥) ∈ (𝑥𝐻𝑥) ∧ ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 ∀𝑓 ∈ (𝑥𝐻𝑦)∀𝑔 ∈ (𝑦𝐻𝑧)(𝑔(〈𝑥, 𝑦〉(comp‘𝐶)𝑧)𝑓) ∈ (𝑥𝐻𝑧))) |
| 26 | eqid 2760 | . . 3 ⊢ (Homf ‘𝐶) = (Homf ‘𝐶) | |
| 27 | eqid 2760 | . . 3 ⊢ (Id‘𝐶) = (Id‘𝐶) | |
| 28 | eqid 2760 | . . 3 ⊢ (comp‘𝐶) = (comp‘𝐶) | |
| 29 | 9 | rngccat 20799 | . . . 4 ⊢ (𝑈 ∈ 𝑉 → 𝐶 ∈ Cat) |
| 30 | 1, 29 | syl 18 | . . 3 ⊢ (𝜑 → 𝐶 ∈ Cat) |
| 31 | incom 4155 | . . . . 5 ⊢ (Ring ∩ 𝑈) = (𝑈 ∩ Ring) | |
| 32 | 2, 31 | eqtrdi 2811 | . . . 4 ⊢ (𝜑 → 𝐵 = (𝑈 ∩ Ring)) |
| 33 | 32, 15 | rhmresfn 20813 | . . 3 ⊢ (𝜑 → 𝐻 Fn (𝐵 × 𝐵)) |
| 34 | 26, 27, 28, 30, 33 | issubc2 17928 | . 2 ⊢ (𝜑 → (𝐻 ∈ (Subcat‘𝐶) ↔ (𝐻 ⊆cat (Homf ‘𝐶) ∧ ∀𝑥 ∈ 𝐵 (((Id‘𝐶)‘𝑥) ∈ (𝑥𝐻𝑥) ∧ ∀𝑦 ∈ 𝐵 ∀𝑧 ∈ 𝐵 ∀𝑓 ∈ (𝑥𝐻𝑦)∀𝑔 ∈ (𝑦𝐻𝑧)(𝑔(〈𝑥, 𝑦〉(comp‘𝐶)𝑧)𝑓) ∈ (𝑥𝐻𝑧))))) |
| 35 | 21, 25, 34 | mpbir2and 726 | 1 ⊢ (𝜑 → 𝐻 ∈ (Subcat‘𝐶)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∀wral 3076 ∩ cin 3898 〈cop 4590 class class class wbr 5103 × cxp 5653 ↾ cres 5657 ‘cfv 6533 (class class class)co 7414 Basecbs 17304 Hom chom 17356 compcco 17357 Catccat 17755 Idccid 17756 Homf chomf 17757 ⊆cat cssc 17899 Subcatcsubc 17901 Rngcrng 20290 Ringcrg 20375 RngHom crnghm 20578 RingHom crh 20613 RngCatcrngc 20781 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-uni 4868 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7864 df-1st 7987 df-2nd 7988 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-1o 8458 df-er 8699 df-map 8831 df-pm 8832 df-ixp 8908 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 df-nn 12261 df-2 12330 df-3 12331 df-4 12332 df-5 12333 df-6 12334 df-7 12335 df-8 12336 df-9 12337 df-n0 12532 df-z 12619 df-dec 12740 df-uz 12891 df-fz 13565 df-struct 17242 df-sets 17259 df-slot 17277 df-ndx 17289 df-base 17305 df-ress 17326 df-plusg 17358 df-hom 17369 df-cco 17370 df-0g 17529 df-cat 17759 df-cid 17760 df-homf 17761 df-ssc 17902 df-resc 17903 df-subc 17904 df-estrc 18214 df-mgm 18733 df-mgmhm 18797 df-sgrp 18824 df-mnd 18840 df-mhm 18894 df-grp 19063 df-minusg 19064 df-ghm 19344 df-cmn 19912 df-abl 19913 df-mgp 20277 df-rng 20291 df-ur 20324 df-ring 20377 df-rnghm 20580 df-rhm 20616 df-rngc 20782 df-ringc 20811 |
| This theorem is used by: (None) |
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