Theorem ringdi 20242

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	⊢ + = (+g‘𝑅)
ringdi.t	⊢ · = (.r‘𝑅)

Assertion

Ref	Expression
ringdi	⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 · (𝑌 + 𝑍)) = ((𝑋 · 𝑌) + (𝑋 · 𝑍)))

Proof of Theorem ringdi

Step	Hyp	Ref	Expression
1		ringdi.b	. . 3 ⊢ 𝐵 = (Base‘𝑅)
2		ringdi.p	. . 3 ⊢ + = (+g‘𝑅)
3		ringdi.t	. . 3 ⊢ · = (.r‘𝑅)
4	1, 2, 3	ringdilem 20230	. 2 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → ((𝑋 · (𝑌 + 𝑍)) = ((𝑋 · 𝑌) + (𝑋 · 𝑍)) ∧ ((𝑋 + 𝑌) · 𝑍) = ((𝑋 · 𝑍) + (𝑌 · 𝑍))))
5	4	simpld 494	1 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 · (𝑌 + 𝑍)) = ((𝑋 · 𝑌) + (𝑋 · 𝑍)))

Syntax hints:   → wi 4   ∧ wa 395   ∧ w3a 1087   = wceq 1542   ∈ wcel 2114  ‘cfv 6499  (class class class)co 7367  Basecbs 17179  +_gcplusg 17220  ._rcmulr 17221  Ringcrg 20214

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 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-12 2185  ax-ext 2709  ax-nul 5242

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1545  df-fal 1555  df-ex 1782  df-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-ne 2934  df-ral 3053  df-rab 3391  df-v 3432  df-sbc 3730  df-dif 3893  df-un 3895  df-ss 3907  df-nul 4275  df-if 4468  df-sn 4569  df-pr 4571  df-op 4575  df-uni 4852  df-br 5087  df-iota 6455  df-fv 6507  df-ov 7370  df-ring 20216

This theorem is referenced by:  ringdid  20244  ringcomlem  20260  ringnegr  20284  ringlghm  20293  prdsringd  20300  imasring  20310  issubrg2  20569  cntzsubr  20583  sralmod  21182  psrlmod  21938  psrdi  21943  mamudir  22369  mdetrlin  22567  mdetuni0  22586  ply1divex  26102  erler  33326  rlocaddval  33329  lfladdcl  39517  lflvsdi2  39525  dvhlveclem  41554