in_nullspace¶
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dolfin.cpp.la.
in_nullspace
(*args)¶ Check whether a vector space basis is in the nullspace of a given operator. The string option ‘type’ can be “right” for the right nullspace (Ax=0) or “left” for the left nullspace (A^Tx = 0). To test the left nullspace, A must also be of type GenericMatrix.