StaggeredBiCGUML Class Reference

MILC staggered UML inverter (optimized bicgstab). More...

#include <fermiqcd_staggered_uml_inverter.h>

List of all members.

Static Public Member Functions
static inversion_stats	inverter (staggered_field &psi_out, staggered_field &psi_in, gauge_field &U, coefficients &coeff, mdp_real absolute_precision=staggered_inversion_precision, mdp_real relative_precision=0, int max_steps=2000)

---

Detailed Description

MILC staggered UML inverter (optimized bicgstab).

The algorithm is taken form hep-lat/9212007 This is best algorithm for staggered fermions

It inverts mul_Q(psi_out,psi_in,U,coeff) iteratively

Parameters:

	psi_out	the output field passed by reference
	psi_in	the input field passed by reference
	U	the gauge field to be passed to mul_Q
	coeff	the gauge parameters to be passed to mul_Q
	absolute_precision	the target absolute precision
	relative_precision	the target relative precision
	max_steps	the maximum number of steps

Example:

    gauge_field U(lattice,nc);
    staggered_field psi(lattice,nc);
    staggered_field chi(lattice,nc);
    coefficinets coeff;
    coeff["kappa"]=1.12;
    U.load("myfield");
    psi.load("myfield_psi");
    default_staggered_inverter=StaggeredBiCGUML::inverter;
    default_staggered_action=StaggeredAsqtadActionFast::mul_Q;
    mul_invQ(chi,psi,U,coeff);
    chi.save("myfield_chi");
    

---

The documentation for this class was generated from the following file:

• fermiqcd_staggered_uml_inverter.h

---