LinearOperator¶
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class
dolfin.cpp.la.
LinearOperator
(*args)¶ Bases:
dolfin.cpp.la.GenericLinearOperator
This class defines an interface for linear operators defined only in terms of their action (matrix-vector product) and can be used for matrix-free solution of linear systems. The linear algebra backend is decided at run-time based on the present value of the “linear_algebra_backend” parameter.
To define a linear operator, users need to inherit from this class and overload the function mult(x, y) which defines the action of the matrix on the vector x as y = Ax.
Create linear operator
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init_layout
()¶
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mult
()¶ Compute matrix-vector product y = Ax
Overloaded versions
shared_instance()
Return concrete instance / unwrap (const shared pointer version)
shared_instance()
Return concrete instance / unwrap (shared pointer version)
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size
()¶ Return size of given dimension
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str
()¶ Return informal string representation (pretty-print)
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thisown
¶ The membership flag
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