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MathGroup Archive 2007

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MatrixRank Modulus->8 - BUG

  • To: mathgroup at smc.vnet.net
  • Subject: [mg73636] MatrixRank Modulus->8 - BUG
  • From: "janos" <janostothmeister at gmail.com>
  • Date: Fri, 23 Feb 2007 04:43:32 -0500 (EST)

Let us introduce
U = {{4, 1, 5}, {3, 4, 2}, {7, 2, 4}};
V = {{5, 1, 4}, {2, 4, 3}, {4, 2, 7}};
and calculate the ranks:
{MatrixRank[U, Modulus -> 8], MatrixRank[V, Modulus -> 8]}
{2,3}
Version:
5.2 for Microsoft Windows

I do not think the rank should depend on the order of columns.
Any idea?

Thanks,

Janos



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