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From Ganesh Swami <gan...@iamganesh.com>
Subject Re: Inverse of a matrix using Map - Reduce
Date Wed, 03 Feb 2010 06:41:06 GMT
What about the Moore-Penrose inverse?

http://en.wikipedia.org/wiki/Moore-Penrose_pseudoinverse

The pseudo-inverse coincides with the regular inverse when the matrix
is non-singular. Moreover, it can be computed using the SVD.

Here's a patch for a MapReduce version of the SVD:
https://issues.apache.org/jira/browse/MAHOUT-180

Ganesh

On Tue, Feb 2, 2010 at 10:11 PM,  <aa225@buffalo.edu> wrote:
> Hello People,
>            My name is Abhishek Agrawal. For the last few days I have been trying
> to figure out how to calculate the inverse of a matrix using Map Reduce. Matrix
> inversion has 2 common approaches. Gaussian- Jordan and the cofactor of transpose
> method. But both of them dont seem to be suited too well for Map- Reduce.
> Gaussian Jordan involves blocking co factoring a matrix requires repeated
> calculation of determinant.
>
> Can some one give me any pointers so as to how to solve this problem ?
>
> Best Regards from Buffalo
>
> Abhishek Agrawal
>
> SUNY- Buffalo
> (716-435-7122)
>
>
>
>

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