NAME
eye - the identity matrix
DESCRIPTION
Following octave, the name eye_rep class is used in place of I to denote identity matrices because I is often used as a subscript or as sqrt(-1). The dimensions of eye_rep are determined by the context. This class is here useful in the context of preconditioner interfaces: it allows calls of algorithms without any preconditioners, e.g.
int status = cg (a, x, b, eye_rep<Float>(), 100, 1e-7);
IMPLEMENTATION
template<class
T, class M = rheo_default_memory_model>
class eye_rep : public solver_abstract_rep<T,M> {
public:
eye_rep (const solver_option& opt = solver_option());
void update_values (const csr<T,M>&) {}
vec<T,M> operator* (const vec<T,M>& x) const
{ return x; }
vec<T,M> solve (const vec<T,M>& x) const {
return x; }
vec<T,M> trans_solve (const vec<T,M>& x)
const { return x; }
};
COPYRIGHT
Copyright (C) 2000-2018 Pierre Saramito <Pierre.Saramito [AT] imag.fr> GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>;. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.