kernel

kernel — kernel, nullspace

Calling sequence

W=kernel(A [,tol,[,flag])

`A`	: full real or complex matrix or real sparse matrix
`flag`	: character string `'svd'` (default) or `'qr'`
`tol`	: real number
`W`	: full column rank matrix

W=kernel(A) returns the kernel (nullspace) of A. If A has full column rank then an empty matrix [] is returned.

flag and tol are optional parameters: flag = 'qr' or 'svd' (default is 'svd').

tol = tolerance parameter (of order %eps as default value).



A=rand(3,1)*rand(1,3);
A*kernel(A)
A=sparse(A);
clean(A*kernel(A))

F.D.;