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serious flaw in KroneckerProduct with SparseArrays?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg91416] serious flaw in KroneckerProduct with SparseArrays?
  • From: wpb <w.p.bergsma at lse.ac.uk>
  • Date: Thu, 21 Aug 2008 04:14:04 -0400 (EDT)

It appears KroneckerProduct doesn't work properly with SparseArrays which have a nonzero constant. Below, the end result should be "True":

In[349]:= a=SparseArray[{1->0},{2},1]
b=Normal[a];
u=KroneckerProduct[a,a]//Normal
v=KroneckerProduct[b,b]
u==v
Out[349]= SparseArray[<1>,{2},1]
Out[351]= {{0,1},{1,1}}
Out[352]= {{0,0},{0,1}}
Out[353]= False


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