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| Mirrors > Home > MPE Home > Th. List > pzriprngALT | Structured version Visualization version GIF version | ||
| Description: The non-unital ring (ℤring ×s ℤring) is unital because it has the two-sided ideal (ℤ × {0}), which is unital, and the quotient of the ring and the ideal is also unital (using ring2idlqusb 21516). (Contributed by AV, 23-Mar-2025.) (Proof modification is discouraged.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| pzriprngALT | ⊢ (ℤring ×s ℤring) ∈ Ring |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | oveq2 7422 | . . . . . 6 ⊢ (𝑖 = (ℤ × {0}) → ((ℤring ×s ℤring) ↾s 𝑖) = ((ℤring ×s ℤring) ↾s (ℤ × {0}))) | |
| 2 | 1 | eleq1d 2845 | . . . . 5 ⊢ (𝑖 = (ℤ × {0}) → (((ℤring ×s ℤring) ↾s 𝑖) ∈ Ring ↔ ((ℤring ×s ℤring) ↾s (ℤ × {0})) ∈ Ring)) |
| 3 | oveq2 7422 | . . . . . . 7 ⊢ (𝑖 = (ℤ × {0}) → ((ℤring ×s ℤring) ~QG 𝑖) = ((ℤring ×s ℤring) ~QG (ℤ × {0}))) | |
| 4 | 3 | oveq2d 7430 | . . . . . 6 ⊢ (𝑖 = (ℤ × {0}) → ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG 𝑖)) = ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG (ℤ × {0})))) |
| 5 | 4 | eleq1d 2845 | . . . . 5 ⊢ (𝑖 = (ℤ × {0}) → (((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG 𝑖)) ∈ Ring ↔ ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG (ℤ × {0}))) ∈ Ring)) |
| 6 | 2, 5 | anbi12d 644 | . . . 4 ⊢ (𝑖 = (ℤ × {0}) → ((((ℤring ×s ℤring) ↾s 𝑖) ∈ Ring ∧ ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG 𝑖)) ∈ Ring) ↔ (((ℤring ×s ℤring) ↾s (ℤ × {0})) ∈ Ring ∧ ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG (ℤ × {0}))) ∈ Ring))) |
| 7 | eqid 2760 | . . . . . 6 ⊢ (ℤring ×s ℤring) = (ℤring ×s ℤring) | |
| 8 | eqid 2760 | . . . . . 6 ⊢ (ℤ × {0}) = (ℤ × {0}) | |
| 9 | eqid 2760 | . . . . . 6 ⊢ ((ℤring ×s ℤring) ↾s (ℤ × {0})) = ((ℤring ×s ℤring) ↾s (ℤ × {0})) | |
| 10 | 7, 8, 9 | pzriprnglem8 21704 | . . . . 5 ⊢ (ℤ × {0}) ∈ (2Ideal‘(ℤring ×s ℤring)) |
| 11 | 10 | a1i 11 | . . . 4 ⊢ (⊤ → (ℤ × {0}) ∈ (2Ideal‘(ℤring ×s ℤring))) |
| 12 | 7, 8, 9 | pzriprnglem7 21703 | . . . . . 6 ⊢ ((ℤring ×s ℤring) ↾s (ℤ × {0})) ∈ Ring |
| 13 | 12 | a1i 11 | . . . . 5 ⊢ (⊤ → ((ℤring ×s ℤring) ↾s (ℤ × {0})) ∈ Ring) |
| 14 | eqid 2760 | . . . . . 6 ⊢ (1r‘((ℤring ×s ℤring) ↾s (ℤ × {0}))) = (1r‘((ℤring ×s ℤring) ↾s (ℤ × {0}))) | |
| 15 | eqid 2760 | . . . . . 6 ⊢ ((ℤring ×s ℤring) ~QG (ℤ × {0})) = ((ℤring ×s ℤring) ~QG (ℤ × {0})) | |
| 16 | eqid 2760 | . . . . . 6 ⊢ ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG (ℤ × {0}))) = ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG (ℤ × {0}))) | |
| 17 | 7, 8, 9, 14, 15, 16 | pzriprnglem13 21709 | . . . . 5 ⊢ ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG (ℤ × {0}))) ∈ Ring |
| 18 | 13, 17 | jctir 530 | . . . 4 ⊢ (⊤ → (((ℤring ×s ℤring) ↾s (ℤ × {0})) ∈ Ring ∧ ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG (ℤ × {0}))) ∈ Ring)) |
| 19 | 6, 11, 18 | rspcedvdw 3579 | . . 3 ⊢ (⊤ → ∃𝑖 ∈ (2Ideal‘(ℤring ×s ℤring))(((ℤring ×s ℤring) ↾s 𝑖) ∈ Ring ∧ ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG 𝑖)) ∈ Ring)) |
| 20 | 19 | mptru 1577 | . 2 ⊢ ∃𝑖 ∈ (2Ideal‘(ℤring ×s ℤring))(((ℤring ×s ℤring) ↾s 𝑖) ∈ Ring ∧ ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG 𝑖)) ∈ Ring) |
| 21 | 7 | pzriprnglem1 21697 | . . 3 ⊢ (ℤring ×s ℤring) ∈ Rng |
| 22 | ring2idlqusb 21516 | . . 3 ⊢ ((ℤring ×s ℤring) ∈ Rng → ((ℤring ×s ℤring) ∈ Ring ↔ ∃𝑖 ∈ (2Ideal‘(ℤring ×s ℤring))(((ℤring ×s ℤring) ↾s 𝑖) ∈ Ring ∧ ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG 𝑖)) ∈ Ring))) | |
| 23 | 21, 22 | ax-mp 5 | . 2 ⊢ ((ℤring ×s ℤring) ∈ Ring ↔ ∃𝑖 ∈ (2Ideal‘(ℤring ×s ℤring))(((ℤring ×s ℤring) ↾s 𝑖) ∈ Ring ∧ ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG 𝑖)) ∈ Ring)) |
| 24 | 20, 23 | mpbir 234 | 1 ⊢ (ℤring ×s ℤring) ∈ Ring |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 401 = wceq 1570 ⊤wtru 1571 ∈ wcel 2145 ∃wrex 3086 {csn 4584 × cxp 5653 ‘cfv 6533 (class class class)co 7414 0cc0 11127 ℤcz 12618 ↾s cress 17325 /s cqus 17594 ×s cxps 17595 ~QG cqg 19248 Rngcrng 20290 1rcur 20323 Ringcrg 20375 2Idealc2idl 21454 ℤringczring 21662 |
| 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 ax-addf 11206 ax-mulf 11207 |
| 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-tpos 8225 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-1o 8458 df-2o 8459 df-er 8699 df-ec 8701 df-qs 8705 df-map 8831 df-ixp 8908 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-sup 9415 df-inf 9416 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-mulr 17359 df-starv 17360 df-sca 17361 df-vsca 17362 df-ip 17363 df-tset 17364 df-ple 17365 df-ds 17367 df-unif 17368 df-hom 17369 df-cco 17370 df-0g 17529 df-prds 17535 df-imas 17597 df-qus 17598 df-xps 17599 df-mgm 18733 df-mgmhm 18797 df-sgrp 18824 df-mnd 18840 df-grp 19063 df-minusg 19064 df-sbg 19065 df-subg 19249 df-nsg 19250 df-eqg 19251 df-ghm 19344 df-cmn 19912 df-abl 19913 df-mgp 20277 df-rng 20291 df-ur 20324 df-ring 20377 df-cring 20378 df-oppr 20481 df-dvdsr 20501 df-unit 20502 df-invr 20532 df-rnghm 20580 df-rngim 20581 df-subrng 20711 df-subrg 20735 df-lmod 21049 df-lss 21119 df-sra 21360 df-rgmod 21361 df-lidl 21398 df-2idl 21455 df-cnfld 21589 df-zring 21663 |
| This theorem is used by: (None) |
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