Theorem slmdass 33158

Description: Semiring left module vector sum is associative. (Contributed by NM, 10-Jan-2014.) (Revised by Mario Carneiro, 19-Jun-2014.) (Revised by Thierry Arnoux, 1-Apr-2018.)

Hypotheses

Ref	Expression
slmdvacl.v	⊢ 𝑉 = (Base‘𝑊)
slmdvacl.a	⊢ + = (+g‘𝑊)

Assertion

Ref	Expression
slmdass	⊢ ((𝑊 ∈ SLMod ∧ (𝑋 ∈ 𝑉 ∧ 𝑌 ∈ 𝑉 ∧ 𝑍 ∈ 𝑉)) → ((𝑋 + 𝑌) + 𝑍) = (𝑋 + (𝑌 + 𝑍)))

Proof of Theorem slmdass

Step	Hyp	Ref	Expression
1		slmdmnd 33151	. 2 ⊢ (𝑊 ∈ SLMod → 𝑊 ∈ Mnd)
2		slmdvacl.v	. . 3 ⊢ 𝑉 = (Base‘𝑊)
3		slmdvacl.a	. . 3 ⊢ + = (+g‘𝑊)
4	2, 3	mndass 18725	. 2 ⊢ ((𝑊 ∈ Mnd ∧ (𝑋 ∈ 𝑉 ∧ 𝑌 ∈ 𝑉 ∧ 𝑍 ∈ 𝑉)) → ((𝑋 + 𝑌) + 𝑍) = (𝑋 + (𝑌 + 𝑍)))
5	1, 4	sylan 580	1 ⊢ ((𝑊 ∈ SLMod ∧ (𝑋 ∈ 𝑉 ∧ 𝑌 ∈ 𝑉 ∧ 𝑍 ∈ 𝑉)) → ((𝑋 + 𝑌) + 𝑍) = (𝑋 + (𝑌 + 𝑍)))

Syntax hints:   → wi 4   ∧ wa 395   ∧ w3a 1086   = wceq 1539   ∈ wcel 2107  ‘cfv 6541  (class class class)co 7413  Basecbs 17229  +_gcplusg 17273  Mndcmnd 18716  SLModcslmd 33145

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1794  ax-4 1808  ax-5 1909  ax-6 1966  ax-7 2006  ax-8 2109  ax-9 2117  ax-ext 2706  ax-nul 5286

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1542  df-fal 1552  df-ex 1779  df-sb 2064  df-clab 2713  df-cleq 2726  df-clel 2808  df-ne 2932  df-ral 3051  df-rex 3060  df-rab 3420  df-v 3465  df-sbc 3771  df-dif 3934  df-un 3936  df-ss 3948  df-nul 4314  df-if 4506  df-sn 4607  df-pr 4609  df-op 4613  df-uni 4888  df-br 5124  df-iota 6494  df-fv 6549  df-ov 7416  df-sgrp 18701  df-mnd 18717  df-cmn 19768  df-slmd 33146

This theorem is referenced by: (None)