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LU decomposition of rectangular matrices

The lupackage method Matrixworks great for square matrices. However, I do not understand why there is a limitation square. How can I do LU decomposition on a rectangular matrix?

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You can embed it in a single matrix:

[ a11 a12 a13 ]
[ a21 a22 a23 ]
[  0   0   1  ]

LU decomposition - only for square matrices. You can check out Wikipedia for an update.

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Non-square matrices mean different things.

, ( , ), , . A LU decomp . "" .

, ( , ), (SVD). .

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Source: https://habr.com/ru/post/1663779/

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