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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 21267). (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 7366 | . . . . . 6 ⊢ (𝑖 = (ℤ × {0}) → ((ℤring ×s ℤring) ↾s 𝑖) = ((ℤring ×s ℤring) ↾s (ℤ × {0}))) | |
| 2 | 1 | eleq1d 2821 | . . . . 5 ⊢ (𝑖 = (ℤ × {0}) → (((ℤring ×s ℤring) ↾s 𝑖) ∈ Ring ↔ ((ℤring ×s ℤring) ↾s (ℤ × {0})) ∈ Ring)) |
| 3 | oveq2 7366 | . . . . . . 7 ⊢ (𝑖 = (ℤ × {0}) → ((ℤring ×s ℤring) ~QG 𝑖) = ((ℤring ×s ℤring) ~QG (ℤ × {0}))) | |
| 4 | 3 | oveq2d 7374 | . . . . . 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 2821 | . . . . 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 632 | . . . 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 2736 | . . . . . 6 ⊢ (ℤring ×s ℤring) = (ℤring ×s ℤring) | |
| 8 | eqid 2736 | . . . . . 6 ⊢ (ℤ × {0}) = (ℤ × {0}) | |
| 9 | eqid 2736 | . . . . . 6 ⊢ ((ℤring ×s ℤring) ↾s (ℤ × {0})) = ((ℤring ×s ℤring) ↾s (ℤ × {0})) | |
| 10 | 7, 8, 9 | pzriprnglem8 21445 | . . . . 5 ⊢ (ℤ × {0}) ∈ (2Ideal‘(ℤring ×s ℤring)) |
| 11 | 10 | a1i 11 | . . . 4 ⊢ (⊤ → (ℤ × {0}) ∈ (2Ideal‘(ℤring ×s ℤring))) |
| 12 | 7, 8, 9 | pzriprnglem7 21444 | . . . . . 6 ⊢ ((ℤring ×s ℤring) ↾s (ℤ × {0})) ∈ Ring |
| 13 | 12 | a1i 11 | . . . . 5 ⊢ (⊤ → ((ℤring ×s ℤring) ↾s (ℤ × {0})) ∈ Ring) |
| 14 | eqid 2736 | . . . . . 6 ⊢ (1r‘((ℤring ×s ℤring) ↾s (ℤ × {0}))) = (1r‘((ℤring ×s ℤring) ↾s (ℤ × {0}))) | |
| 15 | eqid 2736 | . . . . . 6 ⊢ ((ℤring ×s ℤring) ~QG (ℤ × {0})) = ((ℤring ×s ℤring) ~QG (ℤ × {0})) | |
| 16 | eqid 2736 | . . . . . 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 21450 | . . . . 5 ⊢ ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG (ℤ × {0}))) ∈ Ring |
| 18 | 13, 17 | jctir 520 | . . . 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 1548 | . 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 21438 | . . 3 ⊢ (ℤring ×s ℤring) ∈ Rng |
| 22 | ring2idlqusb 21267 | . . 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 231 | 1 ⊢ (ℤring ×s ℤring) ∈ Ring |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∧ wa 395 = wceq 1541 ⊤wtru 1542 ∈ wcel 2113 ∃wrex 3060 {csn 4580 × cxp 5622 ‘cfv 6492 (class class class)co 7358 0cc0 11028 ℤcz 12490 ↾s cress 17159 /s cqus 17428 ×s cxps 17429 ~QG cqg 19054 Rngcrng 20089 1rcur 20118 Ringcrg 20170 2Idealc2idl 21206 ℤringczring 21403 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-rep 5224 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 ax-cnex 11084 ax-resscn 11085 ax-1cn 11086 ax-icn 11087 ax-addcl 11088 ax-addrcl 11089 ax-mulcl 11090 ax-mulrcl 11091 ax-mulcom 11092 ax-addass 11093 ax-mulass 11094 ax-distr 11095 ax-i2m1 11096 ax-1ne0 11097 ax-1rid 11098 ax-rnegex 11099 ax-rrecex 11100 ax-cnre 11101 ax-pre-lttri 11102 ax-pre-lttrn 11103 ax-pre-ltadd 11104 ax-pre-mulgt0 11105 ax-addf 11107 ax-mulf 11108 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3350 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-pss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-tp 4585 df-op 4587 df-uni 4864 df-iun 4948 df-br 5099 df-opab 5161 df-mpt 5180 df-tr 5206 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7809 df-1st 7933 df-2nd 7934 df-tpos 8168 df-frecs 8223 df-wrecs 8254 df-recs 8303 df-rdg 8341 df-1o 8397 df-2o 8398 df-er 8635 df-ec 8637 df-qs 8641 df-map 8767 df-ixp 8838 df-en 8886 df-dom 8887 df-sdom 8888 df-fin 8889 df-sup 9347 df-inf 9348 df-pnf 11170 df-mnf 11171 df-xr 11172 df-ltxr 11173 df-le 11174 df-sub 11368 df-neg 11369 df-nn 12148 df-2 12210 df-3 12211 df-4 12212 df-5 12213 df-6 12214 df-7 12215 df-8 12216 df-9 12217 df-n0 12404 df-z 12491 df-dec 12610 df-uz 12754 df-fz 13426 df-struct 17076 df-sets 17093 df-slot 17111 df-ndx 17123 df-base 17139 df-ress 17160 df-plusg 17192 df-mulr 17193 df-starv 17194 df-sca 17195 df-vsca 17196 df-ip 17197 df-tset 17198 df-ple 17199 df-ds 17201 df-unif 17202 df-hom 17203 df-cco 17204 df-0g 17363 df-prds 17369 df-imas 17431 df-qus 17432 df-xps 17433 df-mgm 18567 df-mgmhm 18619 df-sgrp 18646 df-mnd 18662 df-grp 18868 df-minusg 18869 df-sbg 18870 df-subg 19055 df-nsg 19056 df-eqg 19057 df-ghm 19144 df-cmn 19713 df-abl 19714 df-mgp 20078 df-rng 20090 df-ur 20119 df-ring 20172 df-cring 20173 df-oppr 20275 df-dvdsr 20295 df-unit 20296 df-invr 20326 df-rnghm 20374 df-rngim 20375 df-subrng 20481 df-subrg 20505 df-lmod 20815 df-lss 20885 df-sra 21127 df-rgmod 21128 df-lidl 21165 df-2idl 21207 df-cnfld 21312 df-zring 21404 |
| This theorem is referenced by: (None) |
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