From ae97c20e62c525f9840360cd939596da7670a5a3 Mon Sep 17 00:00:00 2001
From: kalmar <kalmar@amu.edu.pl>
Date: Fri, 21 Jul 2017 13:23:16 +0200
Subject: [PATCH] update \times outer constructor

---
 src/DirectProducts.jl | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/DirectProducts.jl b/src/DirectProducts.jl
index d1fb3a4..b907274 100644
--- a/src/DirectProducts.jl
+++ b/src/DirectProducts.jl
@@ -58,7 +58,10 @@ end
 #
 ###############################################################################
 
-×(G::Group, H::Group) = DirectProductGroup([G,H])
+function ×(G::Group, H::Group)
+   G == H || throw("Direct products are defined only for the same groups")
+   return DirectProductGroup(G,2)
+end
 
 ###############################################################################
 #
@@ -66,8 +69,6 @@ end
 #
 ###############################################################################
 
-(G::DirectProductGroup)() = G([H() for H in G.factors])
-
 (G::DirectProductGroup)(g::DirectProductGroupElem) = G(g.elts)
 
 doc"""