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Theorem orngsqr 29135
 Description: In an ordered ring, all squares are positive. (Contributed by Thierry Arnoux, 20-Jan-2018.)
Hypotheses
Ref Expression
orngmul.0 𝐵 = (Base‘𝑅)
orngmul.1 = (le‘𝑅)
orngmul.2 0 = (0g𝑅)
orngmul.3 · = (.r𝑅)
Assertion
Ref Expression
orngsqr ((𝑅 ∈ oRing ∧ 𝑋𝐵) → 0 (𝑋 · 𝑋))

Proof of Theorem orngsqr
StepHypRef Expression
1 simpll 786 . . 3 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ 0 𝑋) → 𝑅 ∈ oRing)
2 simplr 788 . . 3 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ 0 𝑋) → 𝑋𝐵)
3 simpr 476 . . 3 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ 0 𝑋) → 0 𝑋)
4 orngmul.0 . . . 4 𝐵 = (Base‘𝑅)
5 orngmul.1 . . . 4 = (le‘𝑅)
6 orngmul.2 . . . 4 0 = (0g𝑅)
7 orngmul.3 . . . 4 · = (.r𝑅)
84, 5, 6, 7orngmul 29134 . . 3 ((𝑅 ∈ oRing ∧ (𝑋𝐵0 𝑋) ∧ (𝑋𝐵0 𝑋)) → 0 (𝑋 · 𝑋))
91, 2, 3, 2, 3, 8syl122anc 1327 . 2 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ 0 𝑋) → 0 (𝑋 · 𝑋))
10 simpll 786 . . . 4 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → 𝑅 ∈ oRing)
11 orngring 29131 . . . . . . 7 (𝑅 ∈ oRing → 𝑅 ∈ Ring)
1211ad2antrr 758 . . . . . 6 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → 𝑅 ∈ Ring)
13 ringgrp 18375 . . . . . 6 (𝑅 ∈ Ring → 𝑅 ∈ Grp)
1412, 13syl 17 . . . . 5 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → 𝑅 ∈ Grp)
15 simplr 788 . . . . 5 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → 𝑋𝐵)
16 eqid 2610 . . . . . 6 (invg𝑅) = (invg𝑅)
174, 16grpinvcl 17290 . . . . 5 ((𝑅 ∈ Grp ∧ 𝑋𝐵) → ((invg𝑅)‘𝑋) ∈ 𝐵)
1814, 15, 17syl2anc 691 . . . 4 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → ((invg𝑅)‘𝑋) ∈ 𝐵)
19 orngogrp 29132 . . . . . . . 8 (𝑅 ∈ oRing → 𝑅 ∈ oGrp)
20 isogrp 29033 . . . . . . . . 9 (𝑅 ∈ oGrp ↔ (𝑅 ∈ Grp ∧ 𝑅 ∈ oMnd))
2120simprbi 479 . . . . . . . 8 (𝑅 ∈ oGrp → 𝑅 ∈ oMnd)
2219, 21syl 17 . . . . . . 7 (𝑅 ∈ oRing → 𝑅 ∈ oMnd)
2310, 22syl 17 . . . . . 6 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → 𝑅 ∈ oMnd)
244, 6grpidcl 17273 . . . . . . 7 (𝑅 ∈ Grp → 0𝐵)
2514, 24syl 17 . . . . . 6 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → 0𝐵)
26 simpl 472 . . . . . . . . . . 11 ((𝑅 ∈ oRing ∧ 𝑋𝐵) → 𝑅 ∈ oRing)
2711, 13, 243syl 18 . . . . . . . . . . . 12 (𝑅 ∈ oRing → 0𝐵)
2826, 27syl 17 . . . . . . . . . . 11 ((𝑅 ∈ oRing ∧ 𝑋𝐵) → 0𝐵)
29 simpr 476 . . . . . . . . . . 11 ((𝑅 ∈ oRing ∧ 𝑋𝐵) → 𝑋𝐵)
3026, 28, 293jca 1235 . . . . . . . . . 10 ((𝑅 ∈ oRing ∧ 𝑋𝐵) → (𝑅 ∈ oRing ∧ 0𝐵𝑋𝐵))
31 eqid 2610 . . . . . . . . . . . 12 (lt‘𝑅) = (lt‘𝑅)
325, 31pltle 16784 . . . . . . . . . . 11 ((𝑅 ∈ oRing ∧ 0𝐵𝑋𝐵) → ( 0 (lt‘𝑅)𝑋0 𝑋))
3332con3dimp 456 . . . . . . . . . 10 (((𝑅 ∈ oRing ∧ 0𝐵𝑋𝐵) ∧ ¬ 0 𝑋) → ¬ 0 (lt‘𝑅)𝑋)
3430, 33sylan 487 . . . . . . . . 9 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → ¬ 0 (lt‘𝑅)𝑋)
35 omndtos 29036 . . . . . . . . . . . . 13 (𝑅 ∈ oMnd → 𝑅 ∈ Toset)
3622, 35syl 17 . . . . . . . . . . . 12 (𝑅 ∈ oRing → 𝑅 ∈ Toset)
374, 5, 31tosso 16859 . . . . . . . . . . . . . 14 (𝑅 ∈ Toset → (𝑅 ∈ Toset ↔ ((lt‘𝑅) Or 𝐵 ∧ ( I ↾ 𝐵) ⊆ )))
3837ibi 255 . . . . . . . . . . . . 13 (𝑅 ∈ Toset → ((lt‘𝑅) Or 𝐵 ∧ ( I ↾ 𝐵) ⊆ ))
3938simpld 474 . . . . . . . . . . . 12 (𝑅 ∈ Toset → (lt‘𝑅) Or 𝐵)
4010, 36, 393syl 18 . . . . . . . . . . 11 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → (lt‘𝑅) Or 𝐵)
41 solin 4982 . . . . . . . . . . 11 (((lt‘𝑅) Or 𝐵 ∧ ( 0𝐵𝑋𝐵)) → ( 0 (lt‘𝑅)𝑋0 = 𝑋𝑋(lt‘𝑅) 0 ))
4240, 25, 15, 41syl12anc 1316 . . . . . . . . . 10 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → ( 0 (lt‘𝑅)𝑋0 = 𝑋𝑋(lt‘𝑅) 0 ))
43 3orass 1034 . . . . . . . . . 10 (( 0 (lt‘𝑅)𝑋0 = 𝑋𝑋(lt‘𝑅) 0 ) ↔ ( 0 (lt‘𝑅)𝑋 ∨ ( 0 = 𝑋𝑋(lt‘𝑅) 0 )))
4442, 43sylib 207 . . . . . . . . 9 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → ( 0 (lt‘𝑅)𝑋 ∨ ( 0 = 𝑋𝑋(lt‘𝑅) 0 )))
45 orel1 396 . . . . . . . . 9 0 (lt‘𝑅)𝑋 → (( 0 (lt‘𝑅)𝑋 ∨ ( 0 = 𝑋𝑋(lt‘𝑅) 0 )) → ( 0 = 𝑋𝑋(lt‘𝑅) 0 )))
4634, 44, 45sylc 63 . . . . . . . 8 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → ( 0 = 𝑋𝑋(lt‘𝑅) 0 ))
47 orcom 401 . . . . . . . . 9 (( 0 = 𝑋𝑋(lt‘𝑅) 0 ) ↔ (𝑋(lt‘𝑅) 00 = 𝑋))
48 eqcom 2617 . . . . . . . . . 10 ( 0 = 𝑋𝑋 = 0 )
4948orbi2i 540 . . . . . . . . 9 ((𝑋(lt‘𝑅) 00 = 𝑋) ↔ (𝑋(lt‘𝑅) 0𝑋 = 0 ))
5047, 49bitri 263 . . . . . . . 8 (( 0 = 𝑋𝑋(lt‘𝑅) 0 ) ↔ (𝑋(lt‘𝑅) 0𝑋 = 0 ))
5146, 50sylib 207 . . . . . . 7 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → (𝑋(lt‘𝑅) 0𝑋 = 0 ))
52 tospos 28989 . . . . . . . . 9 (𝑅 ∈ Toset → 𝑅 ∈ Poset)
5310, 36, 523syl 18 . . . . . . . 8 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → 𝑅 ∈ Poset)
544, 5, 31pleval2 16788 . . . . . . . 8 ((𝑅 ∈ Poset ∧ 𝑋𝐵0𝐵) → (𝑋 0 ↔ (𝑋(lt‘𝑅) 0𝑋 = 0 )))
5553, 15, 25, 54syl3anc 1318 . . . . . . 7 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → (𝑋 0 ↔ (𝑋(lt‘𝑅) 0𝑋 = 0 )))
5651, 55mpbird 246 . . . . . 6 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → 𝑋 0 )
57 eqid 2610 . . . . . . 7 (+g𝑅) = (+g𝑅)
584, 5, 57omndadd 29037 . . . . . 6 ((𝑅 ∈ oMnd ∧ (𝑋𝐵0𝐵 ∧ ((invg𝑅)‘𝑋) ∈ 𝐵) ∧ 𝑋 0 ) → (𝑋(+g𝑅)((invg𝑅)‘𝑋)) ( 0 (+g𝑅)((invg𝑅)‘𝑋)))
5923, 15, 25, 18, 56, 58syl131anc 1331 . . . . 5 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → (𝑋(+g𝑅)((invg𝑅)‘𝑋)) ( 0 (+g𝑅)((invg𝑅)‘𝑋)))
604, 57, 6, 16grprinv 17292 . . . . . 6 ((𝑅 ∈ Grp ∧ 𝑋𝐵) → (𝑋(+g𝑅)((invg𝑅)‘𝑋)) = 0 )
6114, 15, 60syl2anc 691 . . . . 5 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → (𝑋(+g𝑅)((invg𝑅)‘𝑋)) = 0 )
624, 57, 6grplid 17275 . . . . . 6 ((𝑅 ∈ Grp ∧ ((invg𝑅)‘𝑋) ∈ 𝐵) → ( 0 (+g𝑅)((invg𝑅)‘𝑋)) = ((invg𝑅)‘𝑋))
6314, 18, 62syl2anc 691 . . . . 5 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → ( 0 (+g𝑅)((invg𝑅)‘𝑋)) = ((invg𝑅)‘𝑋))
6459, 61, 633brtr3d 4614 . . . 4 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → 0 ((invg𝑅)‘𝑋))
654, 5, 6, 7orngmul 29134 . . . 4 ((𝑅 ∈ oRing ∧ (((invg𝑅)‘𝑋) ∈ 𝐵0 ((invg𝑅)‘𝑋)) ∧ (((invg𝑅)‘𝑋) ∈ 𝐵0 ((invg𝑅)‘𝑋))) → 0 (((invg𝑅)‘𝑋) · ((invg𝑅)‘𝑋)))
6610, 18, 64, 18, 64, 65syl122anc 1327 . . 3 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → 0 (((invg𝑅)‘𝑋) · ((invg𝑅)‘𝑋)))
674, 7, 16, 12, 15, 15ringm2neg 18421 . . 3 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → (((invg𝑅)‘𝑋) · ((invg𝑅)‘𝑋)) = (𝑋 · 𝑋))
6866, 67breqtrd 4609 . 2 (((𝑅 ∈ oRing ∧ 𝑋𝐵) ∧ ¬ 0 𝑋) → 0 (𝑋 · 𝑋))
699, 68pm2.61dan 828 1 ((𝑅 ∈ oRing ∧ 𝑋𝐵) → 0 (𝑋 · 𝑋))
 Colors of variables: wff setvar class Syntax hints:  ¬ wn 3   → wi 4   ↔ wb 195   ∨ wo 382   ∧ wa 383   ∨ w3o 1030   ∧ w3a 1031   = wceq 1475   ∈ wcel 1977   ⊆ wss 3540   class class class wbr 4583   I cid 4948   Or wor 4958   ↾ cres 5040  ‘cfv 5804  (class class class)co 6549  Basecbs 15695  +gcplusg 15768  .rcmulr 15769  lecple 15775  0gc0g 15923  Posetcpo 16763  ltcplt 16764  Tosetctos 16856  Grpcgrp 17245  invgcminusg 17246  Ringcrg 18370  oMndcomnd 29028  oGrpcogrp 29029  oRingcorng 29126 This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892 This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rmo 2904  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-er 7629  df-en 7842  df-dom 7843  df-sdom 7844  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-nn 10898  df-2 10956  df-ndx 15698  df-slot 15699  df-base 15700  df-sets 15701  df-plusg 15781  df-0g 15925  df-preset 16751  df-poset 16769  df-plt 16781  df-toset 16857  df-mgm 17065  df-sgrp 17107  df-mnd 17118  df-grp 17248  df-minusg 17249  df-mgp 18313  df-ur 18325  df-ring 18372  df-omnd 29030  df-ogrp 29031  df-orng 29128 This theorem is referenced by:  orng0le1  29143
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