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Theorem ringdi 19315
Description: Distributive law for the multiplication operation of a ring (left-distributivity). (Contributed by Steve Rodriguez, 9-Sep-2007.)
Hypotheses
Ref Expression
ringdi.b 𝐵 = (Base‘𝑅)
ringdi.p + = (+g𝑅)
ringdi.t · = (.r𝑅)
Assertion
Ref Expression
ringdi ((𝑅 ∈ Ring ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 · (𝑌 + 𝑍)) = ((𝑋 · 𝑌) + (𝑋 · 𝑍)))

Proof of Theorem ringdi
StepHypRef Expression
1 ringdi.b . . 3 𝐵 = (Base‘𝑅)
2 ringdi.p . . 3 + = (+g𝑅)
3 ringdi.t . . 3 · = (.r𝑅)
41, 2, 3ringi 19309 . 2 ((𝑅 ∈ Ring ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → ((𝑋 · (𝑌 + 𝑍)) = ((𝑋 · 𝑌) + (𝑋 · 𝑍)) ∧ ((𝑋 + 𝑌) · 𝑍) = ((𝑋 · 𝑍) + (𝑌 · 𝑍))))
54simpld 497 1 ((𝑅 ∈ Ring ∧ (𝑋𝐵𝑌𝐵𝑍𝐵)) → (𝑋 · (𝑌 + 𝑍)) = ((𝑋 · 𝑌) + (𝑋 · 𝑍)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 398  w3a 1083   = wceq 1533  wcel 2110  cfv 6354  (class class class)co 7155  Basecbs 16482  +gcplusg 16564  .rcmulr 16565  Ringcrg 19296
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1792  ax-4 1806  ax-5 1907  ax-6 1966  ax-7 2011  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2157  ax-12 2173  ax-ext 2793  ax-nul 5209
This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3an 1085  df-tru 1536  df-ex 1777  df-nf 1781  df-sb 2066  df-mo 2618  df-eu 2650  df-clab 2800  df-cleq 2814  df-clel 2893  df-nfc 2963  df-ral 3143  df-rex 3144  df-rab 3147  df-v 3496  df-sbc 3772  df-dif 3938  df-un 3940  df-in 3942  df-ss 3951  df-nul 4291  df-if 4467  df-sn 4567  df-pr 4569  df-op 4573  df-uni 4838  df-br 5066  df-iota 6313  df-fv 6362  df-ov 7158  df-ring 19298
This theorem is referenced by:  ringcom  19328  ringrz  19337  rngnegr  19344  ringsubdi  19348  ringlghm  19353  prdsringd  19361  imasring  19368  opprring  19380  issubrg2  19554  cntzsubr  19567  sralmod  19958  psrlmod  20180  psrdi  20185  mamudir  21012  mdetrlin  21210  mdetuni0  21229  ply1divex  24729  lfladdcl  36206  lflvsdi2  36214  dvhlveclem  38243  lidlrng  44199
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