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why we calculate trace of a matrix

 Oct 19, 2014

Best Answer 

 #1
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The trace of a matrix is the sum of the diagonal elements.  It is a property of the matrix that can sometimes be useful; for example, it is equal to the sum of all the eigenvalues of the characteristic polynomial of the matrix.  

See http://en.wikipedia.org/wiki/Trace_(linear_algebra) for more information.

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 Oct 19, 2014
 #1
avatar+33616 
+10
Best Answer

The trace of a matrix is the sum of the diagonal elements.  It is a property of the matrix that can sometimes be useful; for example, it is equal to the sum of all the eigenvalues of the characteristic polynomial of the matrix.  

See http://en.wikipedia.org/wiki/Trace_(linear_algebra) for more information.

.

Alan Oct 19, 2014

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