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MathGroup Archive 2006

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determinant of sparse matrix

  • To: mathgroup at smc.vnet.net
  • Subject: [mg64185] determinant of sparse matrix
  • From: Mark Fisher <mark at markfisher.net>
  • Date: Sat, 4 Feb 2006 04:13:39 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

Are there methods for computing the determinant of (large) sparse 
matrices? Mathematica shuts down the kernel when I ask for

Det[iden]

where

iden = SparseArray[{i_, i_} -> 1. {10^4, 10^4}, 0.]

Of course I know the answer in this case, but more generally I'm 
interested in the determinant of tridiagonal positive definite matrices.

--Mark.


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