Theorem isabld 19725

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 18878	. . 3 ⊢ (𝜑 → 𝐺 ∈ Mnd)
5		isabld.c	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥 + 𝑦) = (𝑦 + 𝑥))
6	2, 3, 4, 5	iscmnd 19724	. 2 ⊢ (𝜑 → 𝐺 ∈ CMnd)
7		isabl 19714	. 2 ⊢ (𝐺 ∈ Abel ↔ (𝐺 ∈ Grp ∧ 𝐺 ∈ CMnd))
8	1, 6, 7	sylanbrc 583	1 ⊢ (𝜑 → 𝐺 ∈ Abel)

Syntax hints:   → wi 4   ∧ w3a 1086   = wceq 1540   ∈ wcel 2109  ‘cfv 6511  (class class class)co 7387  Basecbs 17179  +_gcplusg 17220  Grpcgrp 18865  CMndccmn 19710  Abelcabl 19711

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2008  ax-8 2111  ax-9 2119  ax-ext 2701

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-sb 2066  df-clab 2708  df-cleq 2721  df-clel 2803  df-ral 3045  df-rex 3054  df-rab 3406  df-v 3449  df-dif 3917  df-un 3919  df-in 3921  df-ss 3931  df-nul 4297  df-if 4489  df-sn 4590  df-pr 4592  df-op 4596  df-uni 4872  df-br 5108  df-iota 6464  df-fv 6519  df-ov 7390  df-grp 18868  df-cmn 19712  df-abl 19713

This theorem is referenced by:  subgabl  19766  gex2abl  19781  cygabl  19821  ringabl  20190  lmodabl  20815  dchrabl  27165  tgrpabl  40745  erngdvlem2N  40983  erngdvlem2-rN  40991