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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 12683 | . . . . . 6 ⊢ ℤ ∈ V | |
| 2 | 1 | mptex 7221 | . . . . 5 ⊢ (𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟))) ∈ V |
| 3 | irinitoringc.c | . . . . . . . . 9 ⊢ 𝐶 = (RingCat‘𝑈) | |
| 4 | eqid 2761 | . . . . . . . . 9 ⊢ (Base‘𝐶) = (Base‘𝐶) | |
| 5 | irinitoringc.u | . . . . . . . . 9 ⊢ (𝜑 → 𝑈 ∈ 𝑉) | |
| 6 | eqid 2761 | . . . . . . . . 9 ⊢ (Hom ‘𝐶) = (Hom ‘𝐶) | |
| 7 | 3, 4, 5, 6 | ringchomfval 20883 | . . . . . . . 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 7429 | . . . . . 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 21735 | . . . . . . . . . . . 12 ⊢ ℤring ∈ Ring | |
| 13 | 12 | a1i 11 | . . . . . . . . . . 11 ⊢ (ℤring ∈ 𝑈 → ℤring ∈ Ring) |
| 14 | 11, 13 | elind 4146 | . . . . . . . . . 10 ⊢ (ℤring ∈ 𝑈 → ℤring ∈ (𝑈 ∩ Ring)) |
| 15 | 10, 14 | syl 18 | . . . . . . . . 9 ⊢ (𝜑 → ℤring ∈ (𝑈 ∩ Ring)) |
| 16 | 3, 4, 5 | ringcbas 20882 | . . . . . . . . 9 ⊢ (𝜑 → (Base‘𝐶) = (𝑈 ∩ Ring)) |
| 17 | 15, 16 | eleqtrrd 2864 | . . . . . . . 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 7579 | . . . . . 6 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → (ℤring( RingHom ↾ ((Base‘𝐶) × (Base‘𝐶)))𝑟) = (ℤring RingHom 𝑟)) |
| 21 | 16 | eleq2d 2847 | . . . . . . . . 9 ⊢ (𝜑 → (𝑟 ∈ (Base‘𝐶) ↔ 𝑟 ∈ (𝑈 ∩ Ring))) |
| 22 | elin 3915 | . . . . . . . . . 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 2761 | . . . . . . . 8 ⊢ (.g‘𝑟) = (.g‘𝑟) | |
| 27 | eqid 2761 | . . . . . . . 8 ⊢ (𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟))) = (𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟))) | |
| 28 | eqid 2761 | . . . . . . . 8 ⊢ (1r‘𝑟) = (1r‘𝑟) | |
| 29 | 26, 27, 28 | mulgrhm2 21764 | . . . . . . 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 2800 | . . . . 5 ⊢ ((𝜑 ∧ 𝑟 ∈ (Base‘𝐶)) → (ℤring(Hom ‘𝐶)𝑟) = {(𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟)))}) |
| 32 | sneq 4594 | . . . . . . 7 ⊢ (𝑓 = (𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟))) → {𝑓} = {(𝑧 ∈ ℤ ↦ (𝑧(.g‘𝑟)(1r‘𝑟)))}) | |
| 33 | 32 | eqeq2d 2772 | . . . . . 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 3552 | . . . . 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 4691 | . . . 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 3155 | . 2 ⊢ (𝜑 → ∀𝑟 ∈ (Base‘𝐶)∃!𝑓 𝑓 ∈ (ℤring(Hom ‘𝐶)𝑟)) |
| 39 | 3 | ringccat 20895 | . . . 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 4146 | . . . 4 ⊢ (𝜑 → ℤring ∈ (𝑈 ∩ Ring)) |
| 43 | 42, 16 | eleqtrrd 2864 | . . 3 ⊢ (𝜑 → ℤring ∈ (Base‘𝐶)) |
| 44 | 4, 6, 40, 43 | isinito 18151 | . 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 2594 ∀wral 3077 Vcvv 3451 ∩ cin 3898 {csn 4584 ↦ cmpt 5186 × cxp 5649 ↾ cres 5653 ‘cfv 6531 (class class class)co 7412 ℤcz 12674 Basecbs 17367 Hom chom 17419 Catccat 17818 InitOcinito 18136 .gcmg 19257 1rcur 20387 Ringcrg 20439 RingHom crh 20679 RingCatcringc 20877 ℤringczring 21732 |
| 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 2733 ax-rep 5232 ax-sep 5249 ax-nul 5260 ax-pow 5327 ax-pr 5391 ax-un 7740 ax-cnex 11237 ax-resscn 11238 ax-1cn 11239 ax-icn 11240 ax-addcl 11241 ax-addrcl 11242 ax-mulcl 11243 ax-mulrcl 11244 ax-mulcom 11245 ax-addass 11246 ax-mulass 11247 ax-distr 11248 ax-i2m1 11249 ax-1ne0 11250 ax-1rid 11251 ax-rnegex 11252 ax-rrecex 11253 ax-cnre 11254 ax-pre-lttri 11255 ax-pre-lttrn 11256 ax-pre-ltadd 11257 ax-pre-mulgt0 11258 ax-addf 11260 ax-mulf 11261 |
| 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 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3063 df-ral 3078 df-rex 3088 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3453 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 5546 df-eprel 5551 df-po 5559 df-so 5560 df-fr 5604 df-we 5606 df-xp 5657 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-res 5663 df-ima 5664 df-pred 6297 df-ord 6358 df-on 6359 df-lim 6360 df-suc 6361 df-iota 6487 df-fun 6533 df-fn 6534 df-f 6535 df-f1 6536 df-fo 6537 df-f1o 6538 df-fv 6539 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7867 df-1st 7990 df-2nd 7991 df-frecs 8283 df-wrecs 8314 df-recs 8363 df-rdg 8402 df-1o 8460 df-er 8701 df-map 8833 df-pm 8834 df-ixp 8910 df-en 8958 df-dom 8959 df-sdom 8960 df-fin 8961 df-pnf 11326 df-mnf 11327 df-xr 11328 df-ltxr 11329 df-le 11330 df-sub 11524 df-neg 11525 df-nn 12317 df-2 12386 df-3 12387 df-4 12388 df-5 12389 df-6 12390 df-7 12391 df-8 12392 df-9 12393 df-n0 12588 df-z 12675 df-dec 12796 df-uz 12947 df-fz 13621 df-seq 14125 df-struct 17305 df-sets 17322 df-slot 17340 df-ndx 17352 df-base 17368 df-ress 17389 df-plusg 17421 df-mulr 17422 df-starv 17423 df-tset 17427 df-ple 17428 df-ds 17430 df-unif 17431 df-hom 17432 df-cco 17433 df-0g 17592 df-cat 17822 df-cid 17823 df-homf 17824 df-ssc 17965 df-resc 17966 df-subc 17967 df-inito 18139 df-estrc 18277 df-mgm 18796 df-sgrp 18888 df-mnd 18904 df-mhm 18958 df-grp 19127 df-minusg 19128 df-mulg 19258 df-subg 19313 df-ghm 19408 df-cmn 19976 df-abl 19977 df-mgp 20341 df-rng 20355 df-ur 20388 df-ring 20441 df-cring 20442 df-rhm 20682 df-subrng 20778 df-subrg 20802 df-ringc 20878 df-cnfld 21659 df-zring 21733 |
| This theorem is used by: nzerooringczr 21766 |
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