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Mirrors > Home > MPE Home > Th. List > isnzr2hash | Structured version Visualization version GIF version |
Description: Equivalent characterization of nonzero rings: they have at least two elements. Analogous to isnzr2 20647. (Contributed by AV, 14-Apr-2019.) |
Ref | Expression |
---|---|
isnzr2hash.b | ⊢ 𝐵 = (Base‘𝑅) |
Ref | Expression |
---|---|
isnzr2hash | ⊢ (𝑅 ∈ NzRing ↔ (𝑅 ∈ Ring ∧ 1 < (♯‘𝐵))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqid 2737 | . . 3 ⊢ (1r‘𝑅) = (1r‘𝑅) | |
2 | eqid 2737 | . . 3 ⊢ (0g‘𝑅) = (0g‘𝑅) | |
3 | 1, 2 | isnzr 20643 | . 2 ⊢ (𝑅 ∈ NzRing ↔ (𝑅 ∈ Ring ∧ (1r‘𝑅) ≠ (0g‘𝑅))) |
4 | isnzr2hash.b | . . . . . 6 ⊢ 𝐵 = (Base‘𝑅) | |
5 | 4, 1 | ringidcl 19909 | . . . . 5 ⊢ (𝑅 ∈ Ring → (1r‘𝑅) ∈ 𝐵) |
6 | 4, 2 | ring0cl 19910 | . . . . 5 ⊢ (𝑅 ∈ Ring → (0g‘𝑅) ∈ 𝐵) |
7 | 1xr 11147 | . . . . . . . 8 ⊢ 1 ∈ ℝ* | |
8 | 7 | a1i 11 | . . . . . . 7 ⊢ ((((1r‘𝑅) ∈ 𝐵 ∧ (0g‘𝑅) ∈ 𝐵) ∧ (1r‘𝑅) ≠ (0g‘𝑅)) → 1 ∈ ℝ*) |
9 | prex 5387 | . . . . . . . 8 ⊢ {(1r‘𝑅), (0g‘𝑅)} ∈ V | |
10 | hashxrcl 14184 | . . . . . . . 8 ⊢ ({(1r‘𝑅), (0g‘𝑅)} ∈ V → (♯‘{(1r‘𝑅), (0g‘𝑅)}) ∈ ℝ*) | |
11 | 9, 10 | mp1i 13 | . . . . . . 7 ⊢ ((((1r‘𝑅) ∈ 𝐵 ∧ (0g‘𝑅) ∈ 𝐵) ∧ (1r‘𝑅) ≠ (0g‘𝑅)) → (♯‘{(1r‘𝑅), (0g‘𝑅)}) ∈ ℝ*) |
12 | 4 | fvexi 6851 | . . . . . . . 8 ⊢ 𝐵 ∈ V |
13 | hashxrcl 14184 | . . . . . . . 8 ⊢ (𝐵 ∈ V → (♯‘𝐵) ∈ ℝ*) | |
14 | 12, 13 | mp1i 13 | . . . . . . 7 ⊢ ((((1r‘𝑅) ∈ 𝐵 ∧ (0g‘𝑅) ∈ 𝐵) ∧ (1r‘𝑅) ≠ (0g‘𝑅)) → (♯‘𝐵) ∈ ℝ*) |
15 | 1lt2 12257 | . . . . . . . 8 ⊢ 1 < 2 | |
16 | hashprg 14222 | . . . . . . . . 9 ⊢ (((1r‘𝑅) ∈ 𝐵 ∧ (0g‘𝑅) ∈ 𝐵) → ((1r‘𝑅) ≠ (0g‘𝑅) ↔ (♯‘{(1r‘𝑅), (0g‘𝑅)}) = 2)) | |
17 | 16 | biimpa 478 | . . . . . . . 8 ⊢ ((((1r‘𝑅) ∈ 𝐵 ∧ (0g‘𝑅) ∈ 𝐵) ∧ (1r‘𝑅) ≠ (0g‘𝑅)) → (♯‘{(1r‘𝑅), (0g‘𝑅)}) = 2) |
18 | 15, 17 | breqtrrid 5141 | . . . . . . 7 ⊢ ((((1r‘𝑅) ∈ 𝐵 ∧ (0g‘𝑅) ∈ 𝐵) ∧ (1r‘𝑅) ≠ (0g‘𝑅)) → 1 < (♯‘{(1r‘𝑅), (0g‘𝑅)})) |
19 | simpl 484 | . . . . . . . . 9 ⊢ ((((1r‘𝑅) ∈ 𝐵 ∧ (0g‘𝑅) ∈ 𝐵) ∧ (1r‘𝑅) ≠ (0g‘𝑅)) → ((1r‘𝑅) ∈ 𝐵 ∧ (0g‘𝑅) ∈ 𝐵)) | |
20 | fvex 6850 | . . . . . . . . . 10 ⊢ (1r‘𝑅) ∈ V | |
21 | fvex 6850 | . . . . . . . . . 10 ⊢ (0g‘𝑅) ∈ V | |
22 | 20, 21 | prss 4778 | . . . . . . . . 9 ⊢ (((1r‘𝑅) ∈ 𝐵 ∧ (0g‘𝑅) ∈ 𝐵) ↔ {(1r‘𝑅), (0g‘𝑅)} ⊆ 𝐵) |
23 | 19, 22 | sylib 217 | . . . . . . . 8 ⊢ ((((1r‘𝑅) ∈ 𝐵 ∧ (0g‘𝑅) ∈ 𝐵) ∧ (1r‘𝑅) ≠ (0g‘𝑅)) → {(1r‘𝑅), (0g‘𝑅)} ⊆ 𝐵) |
24 | hashss 14236 | . . . . . . . 8 ⊢ ((𝐵 ∈ V ∧ {(1r‘𝑅), (0g‘𝑅)} ⊆ 𝐵) → (♯‘{(1r‘𝑅), (0g‘𝑅)}) ≤ (♯‘𝐵)) | |
25 | 12, 23, 24 | sylancr 588 | . . . . . . 7 ⊢ ((((1r‘𝑅) ∈ 𝐵 ∧ (0g‘𝑅) ∈ 𝐵) ∧ (1r‘𝑅) ≠ (0g‘𝑅)) → (♯‘{(1r‘𝑅), (0g‘𝑅)}) ≤ (♯‘𝐵)) |
26 | 8, 11, 14, 18, 25 | xrltletrd 13008 | . . . . . 6 ⊢ ((((1r‘𝑅) ∈ 𝐵 ∧ (0g‘𝑅) ∈ 𝐵) ∧ (1r‘𝑅) ≠ (0g‘𝑅)) → 1 < (♯‘𝐵)) |
27 | 26 | ex 414 | . . . . 5 ⊢ (((1r‘𝑅) ∈ 𝐵 ∧ (0g‘𝑅) ∈ 𝐵) → ((1r‘𝑅) ≠ (0g‘𝑅) → 1 < (♯‘𝐵))) |
28 | 5, 6, 27 | syl2anc 585 | . . . 4 ⊢ (𝑅 ∈ Ring → ((1r‘𝑅) ≠ (0g‘𝑅) → 1 < (♯‘𝐵))) |
29 | 28 | imdistani 570 | . . 3 ⊢ ((𝑅 ∈ Ring ∧ (1r‘𝑅) ≠ (0g‘𝑅)) → (𝑅 ∈ Ring ∧ 1 < (♯‘𝐵))) |
30 | simpl 484 | . . . 4 ⊢ ((𝑅 ∈ Ring ∧ 1 < (♯‘𝐵)) → 𝑅 ∈ Ring) | |
31 | 4, 1, 2 | ring1ne0 19932 | . . . 4 ⊢ ((𝑅 ∈ Ring ∧ 1 < (♯‘𝐵)) → (1r‘𝑅) ≠ (0g‘𝑅)) |
32 | 30, 31 | jca 513 | . . 3 ⊢ ((𝑅 ∈ Ring ∧ 1 < (♯‘𝐵)) → (𝑅 ∈ Ring ∧ (1r‘𝑅) ≠ (0g‘𝑅))) |
33 | 29, 32 | impbii 208 | . 2 ⊢ ((𝑅 ∈ Ring ∧ (1r‘𝑅) ≠ (0g‘𝑅)) ↔ (𝑅 ∈ Ring ∧ 1 < (♯‘𝐵))) |
34 | 3, 33 | bitri 275 | 1 ⊢ (𝑅 ∈ NzRing ↔ (𝑅 ∈ Ring ∧ 1 < (♯‘𝐵))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 = wceq 1541 ∈ wcel 2106 ≠ wne 2941 Vcvv 3443 ⊆ wss 3908 {cpr 4586 class class class wbr 5103 ‘cfv 6491 1c1 10985 ℝ*cxr 11121 < clt 11122 ≤ cle 11123 2c2 12141 ♯chash 14157 Basecbs 17017 0gc0g 17255 1rcur 19839 Ringcrg 19885 NzRingcnzr 20641 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2708 ax-sep 5254 ax-nul 5261 ax-pow 5318 ax-pr 5382 ax-un 7662 ax-cnex 11040 ax-resscn 11041 ax-1cn 11042 ax-icn 11043 ax-addcl 11044 ax-addrcl 11045 ax-mulcl 11046 ax-mulrcl 11047 ax-mulcom 11048 ax-addass 11049 ax-mulass 11050 ax-distr 11051 ax-i2m1 11052 ax-1ne0 11053 ax-1rid 11054 ax-rnegex 11055 ax-rrecex 11056 ax-cnre 11057 ax-pre-lttri 11058 ax-pre-lttrn 11059 ax-pre-ltadd 11060 ax-pre-mulgt0 11061 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2539 df-eu 2568 df-clab 2715 df-cleq 2729 df-clel 2815 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3351 df-reu 3352 df-rab 3406 df-v 3445 df-sbc 3738 df-csb 3854 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-pss 3927 df-nul 4281 df-if 4485 df-pw 4560 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4864 df-int 4906 df-iun 4954 df-br 5104 df-opab 5166 df-mpt 5187 df-tr 5221 df-id 5528 df-eprel 5534 df-po 5542 df-so 5543 df-fr 5585 df-we 5587 df-xp 5636 df-rel 5637 df-cnv 5638 df-co 5639 df-dm 5640 df-rn 5641 df-res 5642 df-ima 5643 df-pred 6249 df-ord 6316 df-on 6317 df-lim 6318 df-suc 6319 df-iota 6443 df-fun 6493 df-fn 6494 df-f 6495 df-f1 6496 df-fo 6497 df-f1o 6498 df-fv 6499 df-riota 7305 df-ov 7352 df-oprab 7353 df-mpo 7354 df-om 7793 df-1st 7911 df-2nd 7912 df-frecs 8179 df-wrecs 8210 df-recs 8284 df-rdg 8323 df-1o 8379 df-oadd 8383 df-er 8581 df-en 8817 df-dom 8818 df-sdom 8819 df-fin 8820 df-dju 9770 df-card 9808 df-pnf 11124 df-mnf 11125 df-xr 11126 df-ltxr 11127 df-le 11128 df-sub 11320 df-neg 11321 df-nn 12087 df-2 12149 df-n0 12347 df-xnn0 12419 df-z 12433 df-uz 12696 df-fz 13353 df-hash 14158 df-sets 16970 df-slot 16988 df-ndx 17000 df-base 17018 df-plusg 17080 df-0g 17257 df-mgm 18431 df-sgrp 18480 df-mnd 18491 df-grp 18684 df-minusg 18685 df-mgp 19823 df-ur 19840 df-ring 19887 df-nzr 20642 |
This theorem is referenced by: 0ringnnzr 20653 prmidl0 31990 qsidomlem1 31992 krull 32007 el0ldepsnzr 46230 |
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