Talk:LU decomposition: Difference between revisions
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although a LUP decomposition exists:
[http://www.wolframalpha.com/input/?i=lu+decomposition+{{1%2C+1%2C+1%2C+1}%2C+{1%2C+1%2C+-1%2C+-1}%2C+{1%2C+-1%2C+0%2C+0}%2C+{0%2C+0%2C+1%2C+-1}}]
I guess the pivotization is at fault.
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