ERP
From Xtreme3D
ERP
Error Reduction Parameter | The Coefficient of correction of an errorThe coefficient, responsible for the restoration of the ������������ ties in the physical cursor (usually in the ODE), and showing what part of the ������ will attempt to correct the ������������ link. So, for example, when the ERP = 1 ������ tries for one iteration of the restore link in "Normal" position (minimize to each other the two ends of the ������������� of articulation, or push out entirely a couple of ��������������� Tel).
See also Physics Engine ODE.