From 3ae6980511e81bd1a08f3216263f441f9e202433 Mon Sep 17 00:00:00 2001
From: Jong Hyun Kim <diluculo@gmail.com>
Date: Thu, 29 Feb 2024 09:27:50 +0900
Subject: [PATCH] Fix LevenbergMarquardtMinimizer stopping condition,
 addressing issue #1061

---
 src/Numerics/Optimization/LevenbergMarquardtMinimizer.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Numerics/Optimization/LevenbergMarquardtMinimizer.cs b/src/Numerics/Optimization/LevenbergMarquardtMinimizer.cs
index acd3b688c..30b40a93e 100644
--- a/src/Numerics/Optimization/LevenbergMarquardtMinimizer.cs
+++ b/src/Numerics/Optimization/LevenbergMarquardtMinimizer.cs
@@ -158,7 +158,7 @@ public NonlinearMinimizationResult Minimum(IObjectiveModel objective, Vector<dou
                     Pstep = Hessian.Solve(-Gradient);
 
                     // if ||ΔP|| <= xTol * (||P|| + xTol), found and stop
-                    if (Pstep.L2Norm() <= stepTolerance * (stepTolerance + P.DotProduct(P)))
+                    if (Pstep.L2Norm() <= stepTolerance * (P.L2Norm() + stepTolerance))
                     {
                         exitCondition = ExitCondition.RelativePoints;
                         break;