Base class for returning coefficient for a given indexpair (i,j) in internal ordering.

#include <TCoeffFn.hh>

Inheritance diagram for TCoeffFn< T >:

Public Member Functions
	TCoeffFn ()
	default constructor

virtual	~TCoeffFn ()
	destructor

virtual bool	is_complex () const
	return true if function is complex valued

virtual matform_t	matrix_format () const
	return format of matrix, e.g. symmetric or hermitian

virtual void	eval (const TIndexSet &rowis, const TIndexSet &colis, value_t *matrix) const

virtual void	eval (const std::vector< idx_t > &tau, const std::vector< idx_t > &sigma, value_t *matrix) const =0

Member Function Documentation

◆ eval() [1/2]

inlinevirtual

return τ x σ subblock of real valued matrix as dense matrix block in column major format

Reimplemented in TPermCoeffFn< T >.

pure virtual

return matrix coefficient for index positions defined by tau and sigma, which may be not be consecutively numbered