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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 12628 | . . . . . 6 ⊢ ℤ ∈ V | |
| 2 | 1 | mptex 7226 | . . . . 5 ⊢ (𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟))) ∈ V |
| 3 | irinitoringc.c | . . . . . . . . 9 ⊢ 𝐶 = (RingCat‘𝑈) | |
| 4 | eqid 2762 | . . . . . . . . 9 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 5 | irinitoringc.u | . . . . . . . . 9 ⊢ (𝜑 → 𝑈 ∈ 𝑉) | |
| 6 | eqid 2762 | . . . . . . . . 9 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶) | |
| 7 | 3, 4, 5, 6 | ringchomfval 20819 | . . . . . . . 8 ⊢ (𝜑 → (Hom ‘𝐶) = ( RingHom ↾ ((Base‘𝐶) × (Base‘𝐶)))) |
| 8 | 7 | adantr 486 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → (Hom ‘𝐶) = ( RingHom ↾ ((Base‘𝐶) × (Base‘𝐶)))) |
| 9 | 8 | oveqd 7434 | . . . . . 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 23 | . . . . . . . . . . 11 ⊢ (ℤring ∈ 𝑈 → ℤring ∈ 𝑈) | |
| 12 | zringring 21668 | . . . . . . . . . . . 12 ⊢ ℤring ∈ Ring | |
| 13 | 12 | a1i 11 | . . . . . . . . . . 11 ⊢ (ℤring ∈ 𝑈 → ℤring ∈ Ring) |
| 14 | 11, 13 | elind 4149 | . . . . . . . . . 10 ⊢ (ℤring ∈ 𝑈 → ℤring ∈ (𝑈 ∩ Ring)) |
| 15 | 10, 14 | syl 18 | . . . . . . . . 9 ⊢ (𝜑 → ℤring ∈ (𝑈 ∩ Ring)) |
| 16 | 3, 4, 5 | ringcbas 20818 | . . . . . . . . 9 ⊢ (𝜑 → (Base‘𝐶) = (𝑈 ∩ Ring)) |
| 17 | 15, 16 | eleqtrrd 2865 | . . . . . . . 8 ⊢ (𝜑 → ℤring ∈ (Base‘𝐶)) |
| 18 | 17 | adantr 486 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → ℤring ∈ (Base‘𝐶)) |
| 19 | simpr 490 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → 𝑟 ∈ (Base‘𝐶)) | |
| 20 | 18, 19 | ovresd 7584 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → (ℤring( RingHom ↾ ((Base‘𝐶) × (Base‘𝐶)))𝑟) = (ℤring RingHom 𝑟)) |
| 21 | 16 | eleq2d 2848 | . . . . . . . . 9 ⊢ (𝜑 → (𝑟 ∈ (Base‘𝐶) ↔ 𝑟 ∈ (𝑈 ∩ Ring))) |
| 22 | elin 3918 | . . . . . . . . . 10 ⊢ (𝑟 ∈ (𝑈 ∩ Ring) ↔ (𝑟 ∈ 𝑈 ∧ 𝑟 ∈ Ring)) | |
| 23 | 22 | simprbi 503 | . . . . . . . . 9 ⊢ (𝑟 ∈ (𝑈 ∩ Ring) → 𝑟 ∈ Ring) |
| 24 | 21, 23 | biimtrdi 256 | . . . . . . . 8 ⊢ (𝜑 → (𝑟 ∈ (Base‘𝐶) → 𝑟 ∈ Ring)) |
| 25 | 24 | imp 412 | . . . . . . 7 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → 𝑟 ∈ Ring) |
| 26 | eqid 2762 | . . . . . . . 8 ⊢ (.g‘𝑟) = (.g‘𝑟) | |
| 27 | eqid 2762 | . . . . . . . 8 ⊢ (𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟))) = (𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟))) | |
| 28 | eqid 2762 | . . . . . . . 8 ⊢ (1r‘𝑟) = (1r‘𝑟) | |
| 29 | 26, 27, 28 | mulgrhm2 21697 | . . . . . . 7 ⊢ (𝑟 ∈ Ring → (ℤring RingHom 𝑟) = {(𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟)))}) |
| 30 | 25, 29 | syl 18 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → (ℤring RingHom 𝑟) = {(𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟)))}) |
| 31 | 9, 20, 30 | 3eqtrd 2801 | . . . . 5 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → (ℤring(Hom ‘𝐶)𝑟) = {(𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟)))}) |
| 32 | sneq 4597 | . . . . . . 7 ⊢ (𝑓 = (𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟))) → {𝑓} = {(𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟)))}) | |
| 33 | 32 | eqeq2d 2773 | . . . . . 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 3554 | . . . . 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 69 | . . . 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 237 | . . 3 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → ∃!𝑓 𝑓 ∈ (ℤring(Hom ‘𝐶)𝑟)) |
| 38 | 37 | ralrimiva 3156 | . 2 ⊢ (𝜑 → ∀𝑟 ∈ (Base‘𝐶)∃!𝑓 𝑓 ∈ (ℤring(Hom ‘𝐶)𝑟)) |
| 39 | 3 | ringccat 20831 | . . . 4 ⊢ (𝑈 ∈ 𝑉 → 𝐶 ∈ Cat) |
| 40 | 5, 39 | syl 18 | . . 3 ⊢ (𝜑 → 𝐶 ∈ Cat) |
| 41 | 12 | a1i 11 | . . . . 5 ⊢ (𝜑 → ℤring ∈ Ring) |
| 42 | 10, 41 | elind 4149 | . . . 4 ⊢ (𝜑 → ℤring ∈ (𝑈 ∩ Ring)) |
| 43 | 42, 16 | eleqtrrd 2865 | . . 3 ⊢ (𝜑 → ℤring ∈ (Base‘𝐶)) |
| 44 | 4, 6, 40, 43 | isinito 18091 | . 2 ⊢ (𝜑 → (ℤring ∈ (InitO‘𝐶) ↔ ∀𝑟 ∈ (Base‘𝐶)∃!𝑓 𝑓 ∈ (ℤring(Hom ‘𝐶)𝑟))) |
| 45 | 38, 44 | mpbird 260 | 1 ⊢ (𝜑 → ℤring ∈ (InitO‘𝐶)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∃wex 1812 ∈ wcel 2145 ∃!weu 2595 ∀wral 3078 Vcvv 3453 ∩ cin 3901 {csn 4587 ↦ cmpt 5190 × cxp 5657 ↾ cres 5661 ‘cfv 6537 (class class class)co 7417 ℤcz 12619 Basecbs 17307 Hom chom 17359 Catccat 17758 InitOcinito 18076 .gcmg 19196 1rcur 20326 Ringcrg 20378 RingHom crh 20616 RingCatcringc 20813 ℤringczring 21665 |
| 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 2215 ax-ext 2734 ax-rep 5236 ax-sep 5255 ax-nul 5267 ax-pow 5334 ax-pr 5402 ax-un 7740 ax-cnex 11184 ax-resscn 11185 ax-1cn 11186 ax-icn 11187 ax-addcl 11188 ax-addrcl 11189 ax-mulcl 11190 ax-mulrcl 11191 ax-mulcom 11192 ax-addass 11193 ax-mulass 11194 ax-distr 11195 ax-i2m1 11196 ax-1ne0 11197 ax-1rid 11198 ax-rnegex 11199 ax-rrecex 11200 ax-cnre 11201 ax-pre-lttri 11202 ax-pre-lttrn 11203 ax-pre-ltadd 11204 ax-pre-mulgt0 11205 ax-addf 11207 ax-mulf 11208 |
| 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 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-nel 3064 df-ral 3079 df-rex 3089 df-rmo 3367 df-reu 3368 df-rab 3415 df-v 3455 df-sbc 3743 df-csb 3851 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-pss 3922 df-nul 4283 df-if 4486 df-pw 4562 df-sn 4588 df-pr 4590 df-tp 4592 df-op 4594 df-uni 4871 df-iun 4956 df-br 5108 df-opab 5172 df-mpt 5191 df-tr 5217 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 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 7374 df-ov 7420 df-oprab 7421 df-mpo 7422 df-om 7867 df-1st 7990 df-2nd 7991 df-frecs 8284 df-wrecs 8315 df-recs 8364 df-rdg 8403 df-1o 8459 df-er 8700 df-map 8832 df-pm 8833 df-ixp 8909 df-en 8957 df-dom 8958 df-sdom 8959 df-fin 8960 df-pnf 11273 df-mnf 11274 df-xr 11275 df-ltxr 11276 df-le 11277 df-sub 11471 df-neg 11472 df-nn 12262 df-2 12331 df-3 12332 df-4 12333 df-5 12334 df-6 12335 df-7 12336 df-8 12337 df-9 12338 df-n0 12533 df-z 12620 df-dec 12741 df-uz 12892 df-fz 13566 df-seq 14070 df-struct 17245 df-sets 17262 df-slot 17280 df-ndx 17292 df-base 17308 df-ress 17329 df-plusg 17361 df-mulr 17362 df-starv 17363 df-tset 17367 df-ple 17368 df-ds 17370 df-unif 17371 df-hom 17372 df-cco 17373 df-0g 17532 df-cat 17762 df-cid 17763 df-homf 17764 df-ssc 17905 df-resc 17906 df-subc 17907 df-inito 18079 df-estrc 18217 df-mgm 18736 df-sgrp 18827 df-mnd 18843 df-mhm 18897 df-grp 19066 df-minusg 19067 df-mulg 19197 df-subg 19252 df-ghm 19347 df-cmn 19915 df-abl 19916 df-mgp 20280 df-rng 20294 df-ur 20327 df-ring 20380 df-cring 20381 df-rhm 20619 df-subrng 20714 df-subrg 20738 df-ringc 20814 df-cnfld 21592 df-zring 21666 |
| This theorem is used by: nzerooringczr 21699 |
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