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MathGroup Archive 1996

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Inverse????

  • To: mathgroup at smc.vnet.net
  • Subject: [mg5477] Inverse????
  • From: Hou-shou Chen <houshou at engin.umich.edu>
  • Date: Wed, 11 Dec 1996 03:15:58 -0500
  • Sender: owner-wri-mathgroup at wolfram.com

A matrix a={{0,0,1},{0,0,1},{1,1,1}} which is singular in Z_2, but  
Inverse commands gives the "result": 


Inverse[a,Modulus->2]=
{{0, 1, 1}, {1, 1, 0}, {1, 0, 0}}. 


Is anything wrong ?



Houshou  



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