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Topic: sum of matrices
Replies: 2   Last Post: Oct 8, 2012 12:39 PM

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Kiuhnm

Posts: 88
Registered: 8/17/07
sum of matrices
Posted: Oct 8, 2012 7:36 AM
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Let X_1,...,X_m and Y_1,...,Y_m be column vectors of length n.
I need to compute
Sum_{i=1}^m X_i^T Y_i
The trivial algorithm takes time O(m n^2). Can we do better?

Kiuhnm


Date Subject Author
10/8/12
Read sum of matrices
Kiuhnm
10/8/12
Read Re: sum of matrices
Kiuhnm
10/8/12
Read Re: sum of matrices
Kiuhnm

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