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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 21304). (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 7365 | . . . . . 6 ⊢ (𝑖 = (ℤ × {0}) → ((ℤring ×s ℤring) ↾s 𝑖) = ((ℤring ×s ℤring) ↾s (ℤ × {0}))) | |
| 2 | 1 | eleq1d 2824 | . . . . 5 ⊢ (𝑖 = (ℤ × {0}) → (((ℤring ×s ℤring) ↾s 𝑖) ∈ Ring ↔ ((ℤring ×s ℤring) ↾s (ℤ × {0})) ∈ Ring)) |
| 3 | oveq2 7365 | . . . . . . 7 ⊢ (𝑖 = (ℤ × {0}) → ((ℤring ×s ℤring) ~QG 𝑖) = ((ℤring ×s ℤring) ~QG (ℤ × {0}))) | |
| 4 | 3 | oveq2d 7373 | . . . . . 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 2824 | . . . . 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 638 | . . . 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 2739 | . . . . . 6 ⊢ (ℤring ×s ℤring) = (ℤring ×s ℤring) | |
| 8 | eqid 2739 | . . . . . 6 ⊢ (ℤ × {0}) = (ℤ × {0}) | |
| 9 | eqid 2739 | . . . . . 6 ⊢ ((ℤring ×s ℤring) ↾s (ℤ × {0})) = ((ℤring ×s ℤring) ↾s (ℤ × {0})) | |
| 10 | 7, 8, 9 | pzriprnglem8 21464 | . . . . 5 ⊢ (ℤ × {0}) ∈ (2Ideal‘(ℤring ×s ℤring)) |
| 11 | 10 | a1i 11 | . . . 4 ⊢ (⊤ → (ℤ × {0}) ∈ (2Ideal‘(ℤring ×s ℤring))) |
| 12 | 7, 8, 9 | pzriprnglem7 21463 | . . . . . 6 ⊢ ((ℤring ×s ℤring) ↾s (ℤ × {0})) ∈ Ring |
| 13 | 12 | a1i 11 | . . . . 5 ⊢ (⊤ → ((ℤring ×s ℤring) ↾s (ℤ × {0})) ∈ Ring) |
| 14 | eqid 2739 | . . . . . 6 ⊢ (1r‘((ℤring ×s ℤring) ↾s (ℤ × {0}))) = (1r‘((ℤring ×s ℤring) ↾s (ℤ × {0}))) | |
| 15 | eqid 2739 | . . . . . 6 ⊢ ((ℤring ×s ℤring) ~QG (ℤ × {0})) = ((ℤring ×s ℤring) ~QG (ℤ × {0})) | |
| 16 | eqid 2739 | . . . . . 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 21469 | . . . . 5 ⊢ ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG (ℤ × {0}))) ∈ Ring |
| 18 | 13, 17 | jctir 525 | . . . 4 ⊢ (⊤ → (((ℤring ×s ℤring) ↾s (ℤ × {0})) ∈ Ring ∧ ((ℤring ×s ℤring) /s ((ℤring ×s ℤring) ~QG (ℤ × {0}))) ∈ Ring)) |
| 19 | 6, 11, 18 | rspcedvdw 3563 | . . 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 1554 | . 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 21457 | . . 3 ⊢ (ℤring ×s ℤring) ∈ Rng |
| 22 | ring2idlqusb 21304 | . . 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 232 | 1 ⊢ (ℤring ×s ℤring) ∈ Ring |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 207 ∧ wa 396 = wceq 1547 ⊤wtru 1548 ∈ wcel 2119 ∃wrex 3063 {csn 4556 × cxp 5617 ‘cfv 6486 (class class class)co 7357 0cc0 11030 ℤcz 12516 ↾s cress 17192 /s cqus 17461 ×s cxps 17462 ~QG cqg 19090 Rngcrng 20125 1rcur 20154 Ringcrg 20206 2Idealc2idl 21243 ℤringczring 21422 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2711 ax-rep 5200 ax-sep 5219 ax-nul 5229 ax-pow 5295 ax-pr 5363 ax-un 7679 ax-cnex 11086 ax-resscn 11087 ax-1cn 11088 ax-icn 11089 ax-addcl 11090 ax-addrcl 11091 ax-mulcl 11092 ax-mulrcl 11093 ax-mulcom 11094 ax-addass 11095 ax-mulass 11096 ax-distr 11097 ax-i2m1 11098 ax-1ne0 11099 ax-1rid 11100 ax-rnegex 11101 ax-rrecex 11102 ax-cnre 11103 ax-pre-lttri 11104 ax-pre-lttrn 11105 ax-pre-ltadd 11106 ax-pre-mulgt0 11107 ax-addf 11109 ax-mulf 11110 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2718 df-cleq 2731 df-clel 2814 df-nfc 2888 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-rmo 3344 df-reu 3345 df-rab 3392 df-v 3433 df-sbc 3724 df-csb 3832 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-pss 3903 df-nul 4263 df-if 4456 df-pw 4532 df-sn 4557 df-pr 4559 df-tp 4561 df-op 4563 df-uni 4840 df-iun 4924 df-br 5074 df-opab 5136 df-mpt 5155 df-tr 5181 df-id 5514 df-eprel 5519 df-po 5527 df-so 5528 df-fr 5572 df-we 5574 df-xp 5625 df-rel 5626 df-cnv 5627 df-co 5628 df-dm 5629 df-rn 5630 df-res 5631 df-ima 5632 df-pred 6253 df-ord 6314 df-on 6315 df-lim 6316 df-suc 6317 df-iota 6442 df-fun 6488 df-fn 6489 df-f 6490 df-f1 6491 df-fo 6492 df-f1o 6493 df-fv 6494 df-riota 7314 df-ov 7360 df-oprab 7361 df-mpo 7362 df-om 7808 df-1st 7932 df-2nd 7933 df-tpos 8167 df-frecs 8222 df-wrecs 8253 df-recs 8302 df-rdg 8340 df-1o 8396 df-2o 8397 df-er 8634 df-ec 8636 df-qs 8640 df-map 8766 df-ixp 8837 df-en 8885 df-dom 8886 df-sdom 8887 df-fin 8888 df-sup 9346 df-inf 9347 df-pnf 11173 df-mnf 11174 df-xr 11175 df-ltxr 11176 df-le 11177 df-sub 11371 df-neg 11372 df-nn 12167 df-2 12236 df-3 12237 df-4 12238 df-5 12239 df-6 12240 df-7 12241 df-8 12242 df-9 12243 df-n0 12430 df-z 12517 df-dec 12637 df-uz 12781 df-fz 13454 df-struct 17109 df-sets 17126 df-slot 17144 df-ndx 17156 df-base 17172 df-ress 17193 df-plusg 17225 df-mulr 17226 df-starv 17227 df-sca 17228 df-vsca 17229 df-ip 17230 df-tset 17231 df-ple 17232 df-ds 17234 df-unif 17235 df-hom 17236 df-cco 17237 df-0g 17396 df-prds 17402 df-imas 17464 df-qus 17465 df-xps 17466 df-mgm 18600 df-mgmhm 18652 df-sgrp 18679 df-mnd 18695 df-grp 18904 df-minusg 18905 df-sbg 18906 df-subg 19091 df-nsg 19092 df-eqg 19093 df-ghm 19180 df-cmn 19749 df-abl 19750 df-mgp 20114 df-rng 20126 df-ur 20155 df-ring 20208 df-cring 20209 df-oppr 20309 df-dvdsr 20329 df-unit 20330 df-invr 20360 df-rnghm 20408 df-rngim 20409 df-subrng 20519 df-subrg 20543 df-lmod 20853 df-lss 20923 df-sra 21164 df-rgmod 21165 df-lidl 21202 df-2idl 21244 df-cnfld 21349 df-zring 21423 |
| This theorem is referenced by: (None) |
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