Theorem isabld 19813

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 18964	. . 3 ⊢ (𝜑 → 𝐺 ∈ Mnd)
5		isabld.c	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐵 ∧ 𝑦 ∈ 𝐵) → (𝑥 + 𝑦) = (𝑦 + 𝑥))
6	2, 3, 4, 5	iscmnd 19812	. 2 ⊢ (𝜑 → 𝐺 ∈ CMnd)
7		isabl 19802	. 2 ⊢ (𝐺 ∈ Abel ↔ (𝐺 ∈ Grp ∧ 𝐺 ∈ CMnd))
8	1, 6, 7	sylanbrc 583	1 ⊢ (𝜑 → 𝐺 ∈ Abel)

Syntax hints:   → wi 4   ∧ w3a 1087   = wceq 1540   ∈ wcel 2108  ‘cfv 6561  (class class class)co 7431  Basecbs 17247  +_gcplusg 17297  Grpcgrp 18951  CMndccmn 19798  Abelcabl 19799

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 2007  ax-8 2110  ax-9 2118  ax-ext 2708

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-3an 1089  df-tru 1543  df-fal 1553  df-ex 1780  df-sb 2065  df-clab 2715  df-cleq 2729  df-clel 2816  df-ral 3062  df-rex 3071  df-rab 3437  df-v 3482  df-dif 3954  df-un 3956  df-in 3958  df-ss 3968  df-nul 4334  df-if 4526  df-sn 4627  df-pr 4629  df-op 4633  df-uni 4908  df-br 5144  df-iota 6514  df-fv 6569  df-ov 7434  df-grp 18954  df-cmn 19800  df-abl 19801

This theorem is referenced by:  subgabl  19854  gex2abl  19869  cygabl  19909  ringabl  20278  lmodabl  20907  dchrabl  27298  tgrpabl  40753  erngdvlem2N  40991  erngdvlem2-rN  40999