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| Mirrors > Home > MPE Home > Th. List > irinitoringc | Structured version Visualization version GIF version | ||
| Description: The ring of integers is an initial object in the category of unital rings (within a universe containing the ring of integers). Example 7.2 (6) of [Adamek] p. 101 , and example in [Lang] p. 58. (Contributed by AV, 3-Apr-2020.) |
| Ref | Expression |
|---|---|
| irinitoringc.u | ⊢ (𝜑 → 𝑈 ∈ 𝑉) |
| irinitoringc.z | ⊢ (𝜑 → ℤring ∈ 𝑈) |
| irinitoringc.c | ⊢ 𝐶 = (RingCat‘𝑈) |
| Ref | Expression |
|---|---|
| irinitoringc | ⊢ (𝜑 → ℤring ∈ (InitO‘𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | zex 12538 | . . . . . 6 ⊢ ℤ ∈ V | |
| 2 | 1 | mptex 7197 | . . . . 5 ⊢ (𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟))) ∈ V |
| 3 | irinitoringc.c | . . . . . . . . 9 ⊢ 𝐶 = (RingCat‘𝑈) | |
| 4 | eqid 2729 | . . . . . . . . 9 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 5 | irinitoringc.u | . . . . . . . . 9 ⊢ (𝜑 → 𝑈 ∈ 𝑉) | |
| 6 | eqid 2729 | . . . . . . . . 9 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶) | |
| 7 | 3, 4, 5, 6 | ringchomfval 20560 | . . . . . . . 8 ⊢ (𝜑 → (Hom ‘𝐶) = ( RingHom ↾ ((Base‘𝐶) × (Base‘𝐶)))) |
| 8 | 7 | adantr 480 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → (Hom ‘𝐶) = ( RingHom ↾ ((Base‘𝐶) × (Base‘𝐶)))) |
| 9 | 8 | oveqd 7404 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → (ℤring(Hom ‘𝐶)𝑟) = (ℤring( RingHom ↾ ((Base‘𝐶) × (Base‘𝐶)))𝑟)) |
| 10 | irinitoringc.z | . . . . . . . . . 10 ⊢ (𝜑 → ℤring ∈ 𝑈) | |
| 11 | id 22 | . . . . . . . . . . 11 ⊢ (ℤring ∈ 𝑈 → ℤring ∈ 𝑈) | |
| 12 | zringring 21359 | . . . . . . . . . . . 12 ⊢ ℤring ∈ Ring | |
| 13 | 12 | a1i 11 | . . . . . . . . . . 11 ⊢ (ℤring ∈ 𝑈 → ℤring ∈ Ring) |
| 14 | 11, 13 | elind 4163 | . . . . . . . . . 10 ⊢ (ℤring ∈ 𝑈 → ℤring ∈ (𝑈 ∩ Ring)) |
| 15 | 10, 14 | syl 17 | . . . . . . . . 9 ⊢ (𝜑 → ℤring ∈ (𝑈 ∩ Ring)) |
| 16 | 3, 4, 5 | ringcbas 20559 | . . . . . . . . 9 ⊢ (𝜑 → (Base‘𝐶) = (𝑈 ∩ Ring)) |
| 17 | 15, 16 | eleqtrrd 2831 | . . . . . . . 8 ⊢ (𝜑 → ℤring ∈ (Base‘𝐶)) |
| 18 | 17 | adantr 480 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → ℤring ∈ (Base‘𝐶)) |
| 19 | simpr 484 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → 𝑟 ∈ (Base‘𝐶)) | |
| 20 | 18, 19 | ovresd 7556 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → (ℤring( RingHom ↾ ((Base‘𝐶) × (Base‘𝐶)))𝑟) = (ℤring RingHom 𝑟)) |
| 21 | 16 | eleq2d 2814 | . . . . . . . . 9 ⊢ (𝜑 → (𝑟 ∈ (Base‘𝐶) ↔ 𝑟 ∈ (𝑈 ∩ Ring))) |
| 22 | elin 3930 | . . . . . . . . . 10 ⊢ (𝑟 ∈ (𝑈 ∩ Ring) ↔ (𝑟 ∈ 𝑈 ∧ 𝑟 ∈ Ring)) | |
| 23 | 22 | simprbi 496 | . . . . . . . . 9 ⊢ (𝑟 ∈ (𝑈 ∩ Ring) → 𝑟 ∈ Ring) |
| 24 | 21, 23 | biimtrdi 253 | . . . . . . . 8 ⊢ (𝜑 → (𝑟 ∈ (Base‘𝐶) → 𝑟 ∈ Ring)) |
| 25 | 24 | imp 406 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → 𝑟 ∈ Ring) |
| 26 | eqid 2729 | . . . . . . . 8 ⊢ (.g‘𝑟) = (.g‘𝑟) | |
| 27 | eqid 2729 | . . . . . . . 8 ⊢ (𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟))) = (𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟))) | |
| 28 | eqid 2729 | . . . . . . . 8 ⊢ (1r‘𝑟) = (1r‘𝑟) | |
| 29 | 26, 27, 28 | mulgrhm2 21388 | . . . . . . 7 ⊢ (𝑟 ∈ Ring → (ℤring RingHom 𝑟) = {(𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟)))}) |
| 30 | 25, 29 | syl 17 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → (ℤring RingHom 𝑟) = {(𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟)))}) |
| 31 | 9, 20, 30 | 3eqtrd 2768 | . . . . 5 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → (ℤring(Hom ‘𝐶)𝑟) = {(𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟)))}) |
| 32 | sneq 4599 | . . . . . . 7 ⊢ (𝑓 = (𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟))) → {𝑓} = {(𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟)))}) | |
| 33 | 32 | eqeq2d 2740 | . . . . . 6 ⊢ (𝑓 = (𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟))) → ((ℤring(Hom ‘𝐶)𝑟) = {𝑓} ↔ (ℤring(Hom ‘𝐶)𝑟) = {(𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟)))})) |
| 34 | 33 | spcegv 3563 | . . . . 5 ⊢ ((𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟))) ∈ V → ((ℤring(Hom ‘𝐶)𝑟) = {(𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟)))} → ∃𝑓(ℤring(Hom ‘𝐶)𝑟) = {𝑓})) |
| 35 | 2, 31, 34 | mpsyl 68 | . . . 4 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → ∃𝑓(ℤring(Hom ‘𝐶)𝑟) = {𝑓}) |
| 36 | eusn 4694 | . . . 4 ⊢ (∃!𝑓 𝑓 ∈ (ℤring(Hom ‘𝐶)𝑟) ↔ ∃𝑓(ℤring(Hom ‘𝐶)𝑟) = {𝑓}) | |
| 37 | 35, 36 | sylibr 234 | . . 3 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → ∃!𝑓 𝑓 ∈ (ℤring(Hom ‘𝐶)𝑟)) |
| 38 | 37 | ralrimiva 3125 | . 2 ⊢ (𝜑 → ∀𝑟 ∈ (Base‘𝐶)∃!𝑓 𝑓 ∈ (ℤring(Hom ‘𝐶)𝑟)) |
| 39 | 3 | ringccat 20572 | . . . 4 ⊢ (𝑈 ∈ 𝑉 → 𝐶 ∈ Cat) |
| 40 | 5, 39 | syl 17 | . . 3 ⊢ (𝜑 → 𝐶 ∈ Cat) |
| 41 | 12 | a1i 11 | . . . . 5 ⊢ (𝜑 → ℤring ∈ Ring) |
| 42 | 10, 41 | elind 4163 | . . . 4 ⊢ (𝜑 → ℤring ∈ (𝑈 ∩ Ring)) |
| 43 | 42, 16 | eleqtrrd 2831 | . . 3 ⊢ (𝜑 → ℤring ∈ (Base‘𝐶)) |
| 44 | 4, 6, 40, 43 | isinito 17958 | . 2 ⊢ (𝜑 → (ℤring ∈ (InitO‘𝐶) ↔ ∀𝑟 ∈ (Base‘𝐶)∃!𝑓 𝑓 ∈ (ℤring(Hom ‘𝐶)𝑟))) |
| 45 | 38, 44 | mpbird 257 | 1 ⊢ (𝜑 → ℤring ∈ (InitO‘𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1540 ∃wex 1779 ∈ wcel 2109 ∃!weu 2561 ∀wral 3044 Vcvv 3447 ∩ cin 3913 {csn 4589 ↦ cmpt 5188 × cxp 5636 ↾ cres 5640 ‘cfv 6511 (class class class)co 7387 ℤcz 12529 Basecbs 17179 Hom chom 17231 Catccat 17625 InitOcinito 17943 .gcmg 18999 1rcur 20090 Ringcrg 20142 RingHom crh 20378 RingCatcringc 20554 ℤringczring 21356 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1910 ax-6 1967 ax-7 2008 ax-8 2111 ax-9 2119 ax-10 2142 ax-11 2158 ax-12 2178 ax-ext 2701 ax-rep 5234 ax-sep 5251 ax-nul 5261 ax-pow 5320 ax-pr 5387 ax-un 7711 ax-cnex 11124 ax-resscn 11125 ax-1cn 11126 ax-icn 11127 ax-addcl 11128 ax-addrcl 11129 ax-mulcl 11130 ax-mulrcl 11131 ax-mulcom 11132 ax-addass 11133 ax-mulass 11134 ax-distr 11135 ax-i2m1 11136 ax-1ne0 11137 ax-1rid 11138 ax-rnegex 11139 ax-rrecex 11140 ax-cnre 11141 ax-pre-lttri 11142 ax-pre-lttrn 11143 ax-pre-ltadd 11144 ax-pre-mulgt0 11145 ax-addf 11147 ax-mulf 11148 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2533 df-eu 2562 df-clab 2708 df-cleq 2721 df-clel 2803 df-nfc 2878 df-ne 2926 df-nel 3030 df-ral 3045 df-rex 3054 df-rmo 3354 df-reu 3355 df-rab 3406 df-v 3449 df-sbc 3754 df-csb 3863 df-dif 3917 df-un 3919 df-in 3921 df-ss 3931 df-pss 3934 df-nul 4297 df-if 4489 df-pw 4565 df-sn 4590 df-pr 4592 df-tp 4594 df-op 4596 df-uni 4872 df-iun 4957 df-br 5108 df-opab 5170 df-mpt 5189 df-tr 5215 df-id 5533 df-eprel 5538 df-po 5546 df-so 5547 df-fr 5591 df-we 5593 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-rn 5649 df-res 5650 df-ima 5651 df-pred 6274 df-ord 6335 df-on 6336 df-lim 6337 df-suc 6338 df-iota 6464 df-fun 6513 df-fn 6514 df-f 6515 df-f1 6516 df-fo 6517 df-f1o 6518 df-fv 6519 df-riota 7344 df-ov 7390 df-oprab 7391 df-mpo 7392 df-om 7843 df-1st 7968 df-2nd 7969 df-frecs 8260 df-wrecs 8291 df-recs 8340 df-rdg 8378 df-1o 8434 df-er 8671 df-map 8801 df-pm 8802 df-ixp 8871 df-en 8919 df-dom 8920 df-sdom 8921 df-fin 8922 df-pnf 11210 df-mnf 11211 df-xr 11212 df-ltxr 11213 df-le 11214 df-sub 11407 df-neg 11408 df-nn 12187 df-2 12249 df-3 12250 df-4 12251 df-5 12252 df-6 12253 df-7 12254 df-8 12255 df-9 12256 df-n0 12443 df-z 12530 df-dec 12650 df-uz 12794 df-fz 13469 df-seq 13967 df-struct 17117 df-sets 17134 df-slot 17152 df-ndx 17164 df-base 17180 df-ress 17201 df-plusg 17233 df-mulr 17234 df-starv 17235 df-tset 17239 df-ple 17240 df-ds 17242 df-unif 17243 df-hom 17244 df-cco 17245 df-0g 17404 df-cat 17629 df-cid 17630 df-homf 17631 df-ssc 17772 df-resc 17773 df-subc 17774 df-inito 17946 df-estrc 18084 df-mgm 18567 df-sgrp 18646 df-mnd 18662 df-mhm 18710 df-grp 18868 df-minusg 18869 df-mulg 19000 df-subg 19055 df-ghm 19145 df-cmn 19712 df-abl 19713 df-mgp 20050 df-rng 20062 df-ur 20091 df-ring 20144 df-cring 20145 df-rhm 20381 df-subrng 20455 df-subrg 20479 df-ringc 20555 df-cnfld 21265 df-zring 21357 |
| This theorem is referenced by: nzerooringczr 21390 |
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