ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  isabl GIF version

Theorem isabl 13014
Description: The predicate "is an Abelian (commutative) group". (Contributed by NM, 17-Oct-2011.)
Assertion
Ref Expression
isabl (𝐺 ∈ Abel ↔ (𝐺 ∈ Grp ∧ 𝐺 ∈ CMnd))

Proof of Theorem isabl
StepHypRef Expression
1 df-abl 13013 . 2 Abel = (Grp ∩ CMnd)
21elin2 3323 1 (𝐺 ∈ Abel ↔ (𝐺 ∈ Grp ∧ 𝐺 ∈ CMnd))
Colors of variables: wff set class
Syntax hints:  wa 104  wb 105  wcel 2148  Grpcgrp 12808  CMndccmn 13010  Abelcabl 13011
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159
This theorem depends on definitions:  df-bi 117  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-v 2739  df-in 3135  df-abl 13013
This theorem is referenced by:  ablgrp  13015  ablcmn  13017  isabl2  13019  ablpropd  13021  isabld  13024  unitabl  13208
  Copyright terms: Public domain W3C validator