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How to use BlockMatrix

• To: mathgroup at smc.vnet.net
• Subject: [mg73082] How to use BlockMatrix
• From: "T.Sariyski" <tsariysk at craft-tech.com>
• Date: Thu, 1 Feb 2007 03:59:32 -0500 (EST)

Hi,
I want to use BlockMatrix. Here is an example:

a11={a0};
a12={a1,a2};
a21={a3,a4};
a22={{i,j},{k,l}};
BlockMatrix[{{a1,a12},{{a21},a22}}]//MatrixForm

Out: 
AppendColumns[AppendRows[a1,{a1,a2}],AppendRows[{{a3,a4}},{{i,j},{k,l}}]]

What I'm doing wrong here? 
Thanks, Ted

• Follow-Ups:
  • Re: How to use BlockMatrix
    • From: Sseziwa Mukasa <mukasa@jeol.com>