Theorem isabld 20060

Description: Properties that determine an Abelian group. (Contributed by NM, 6-Aug-2013.)

Hypotheses

Ref	Expression
isabld.b	⊢ (𝜑 → 𝐵 = (Base‘𝐺))
isabld.p	⊢ (𝜑 → + = (+g‘𝐺))
isabld.g	⊢ (𝜑 → 𝐺 ∈ Grp)
isabld.c	⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥 + 𝑦) = (𝑦 + 𝑥))

Assertion

Ref	Expression
isabld	⊢ (𝜑 → 𝐺 ∈ Abel)

Distinct variable groups:   𝑥,𝑦,𝐵   𝑥,𝐺,𝑦   𝜑,𝑥,𝑦

Allowed substitution hints:   + (𝑥, 𝑦)

Proof of Theorem isabld

Step	Hyp	Ref	Expression
1		isabld.g	. 2 ⊢ (𝜑 → 𝐺 ∈ Grp)
2		isabld.b	. . 3 ⊢ (𝜑 → 𝐵 = (Base‘𝐺))
3		isabld.p	. . 3 ⊢ (𝜑 → + = (+g‘𝐺))
4	1	grpmndd 19207	. . 3 ⊢ (𝜑 → 𝐺 ∈ Mnd)
5		isabld.c	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥 + 𝑦) = (𝑦 + 𝑥))
6	2, 3, 4, 5	iscmnd 20059	. 2 ⊢ (𝜑 → 𝐺 ∈ CMnd)
7		isabl 20049	. 2 ⊢ (𝐺 ∈ Abel ↔ (𝐺 ∈ Grp ∧ 𝐺 ∈ CMnd))
8	1, 6, 7	sylanbrc 595	1 ⊢ (𝜑 → 𝐺 ∈ Abel)

This proof depends on syntax axioms:   → wi 4   ∧ w3a 1103   = wceq 1570   ∈ wcel 2147  ‘cfv 6566  (class class class)co 7451  Basecbs 17431  +_gcplusg 17472  Grpcgrp 19194  CMndccmn 20045  Abelcabl 20046

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-ext 2735

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-ral 3081  df-rex 3091  df-rab 3417  df-v 3456  df-ss 3901  df-dif 4050  df-in 4094  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-grp 19197  df-cmn 20047  df-abl 20048

This theorem is used by:  subgabl  20101  gex2abl  20116  cygabl  20156  ringabl  20561  lmodabl  21235  dchrabl  27638  tgrpabl  42074  erngdvlem2N  42312  erngdvlem2-rN  42320