diff src/samer/maths/opt/AbsXFConvergence.java @ 0:bf79fb79ee13

Initial Mercurial check in.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/samer/maths/opt/AbsXFConvergence.java	Tue Jan 17 17:50:20 2012 +0000
@@ -0,0 +1,30 @@
+/*
+ *	Copyright (c) 2000, Samer Abdallah, King's College London.
+ *	All rights reserved.
+ *
+ *	This software is provided AS iS and WITHOUT ANY WARRANTY; 
+ *	without even the implied warranty of MERCHANTABILITY or 
+ *	FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+package samer.maths.opt;
+import  samer.maths.*;
+
+
+public class AbsXFConvergence
+{
+	double	XTOL=1e-7;	// various tolerances
+	double  FTOL=XTOL*XTOL;
+	
+	public void setXTolerance( double tolx) { XTOL=tolx; }
+	public void setFTolerance( double tolf) { FTOL=tolf; }
+	
+	public boolean isSatisfied(State S) 
+	{
+		// small step taken
+		// this compares the actual step taken with
+		if (Math.abs(S.P1.f-S.P2.f)>FTOL) return false;
+		if (S.alpha*S.normh>XTOL) return false;
+		return true;
+	}
+}