Theorem ringdi 20540

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 20527	. 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 500	1 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ 𝑍 ∈ 𝐵)) → (𝑋 · (𝑌 + 𝑍)) = ((𝑋 · 𝑌) + (𝑋 · 𝑍)))

This proof depends on syntax axioms:   → wi 4   ∧ wa 401   ∧ w3a 1103   = wceq 1570   ∈ wcel 2147  ‘cfv 6566  (class class class)co 7451  Basecbs 17431  +_gcplusg 17472  ._rcmulr 17473  Ringcrg 20510

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1945  ax-6 2002  ax-7 2043  ax-8 2149  ax-9 2157  ax-12 2216  ax-ext 2735  ax-nul 5266

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-sb 2102  df-clab 2742  df-cleq 2755  df-clel 2839  df-ne 2960  df-ral 3081  df-rab 3417  df-v 3456  df-sbc 3743  df-ss 3901  df-dif 4050  df-un 4154  df-nul 4282  df-if 4486  df-sn 4589  df-pr 4591  df-op 4841  df-uni 4873  df-br 5109  df-iota 6520  df-fv 6574  df-ov 7454  df-ring 20512

This theorem is used by:  ringdid  20542  ringcomlem  20559  ringnegr  20585  ringlghm  20594  prdsringd  20601  imasring  20611  issubrg2  20895  cntzsubr  20909  sralmod  21513  psrlmod  22322  psrdi  22327  mamudir  22774  mdetrlin  22972  mdetuni0  22991  ply1divex  26510  erler  33925  rlocaddval  33929  lfladdcl  40394  lflvsdi2  40402  dvhlveclem  42431