From 955aaf48faa6429c94d6c9afe4a974af3121445d Mon Sep 17 00:00:00 2001
From: kalmar <kalmar@amu.edu.pl>
Date: Tue, 16 May 2017 18:36:00 +0200
Subject: [PATCH] == for GroupRing and GroupRingElem

---
 src/GroupAlgebras.jl | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/src/GroupAlgebras.jl b/src/GroupAlgebras.jl
index 41e7fda..72bdb94 100644
--- a/src/GroupAlgebras.jl
+++ b/src/GroupAlgebras.jl
@@ -93,9 +93,22 @@ function show(io::IO, X::GroupRingElem)
    print(io, "Element of Group Algebra of $(parent(X)) over $T:\n $(X.coeffs)")
 end
 
+
+function (==)(X::GroupRingElem, Y::GroupRingElem)
+   parent(X) == parent(Y) || return false
+   if eltype(X.coeffs) != eltype(S.coeffs)
+      warn("Comparing elements with different coeffs Rings!")
+   end
+   X.coeffs == Y.coeffs || return false
+   return true
+end
+
+function (==)(A::GroupRing, B::GroupRing)
+   return A.group == B.group
+end
+
 end
 
-(==)(X::GroupAlgebraElement, Y::GroupAlgebraElement) = isequal(X,Y)
 
 function add{T<:Number}(X::GroupAlgebraElement{T}, Y::GroupAlgebraElement{T})
     X.product_matrix == Y.product_matrix || throw(ArgumentError(