From 350e37219c68d4e7f9eedb76002eb3a889df3a1e Mon Sep 17 00:00:00 2001
From: Ksero <Ksero@users.noreply.github.com>
Date: Fri, 15 Dec 2017 15:43:14 +0100
Subject: [PATCH] Fix another typo in the Runge-Kutta solvers (the time-step
 was added rather than multiplied with the slope) (#531)

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

diff --git a/src/Numerics/OdeSolvers/RungeKutta.cs b/src/Numerics/OdeSolvers/RungeKutta.cs
index 77a65d71..6ee5c757 100644
--- a/src/Numerics/OdeSolvers/RungeKutta.cs
+++ b/src/Numerics/OdeSolvers/RungeKutta.cs
@@ -116,7 +116,7 @@ namespace MathNet.Numerics.OdeSolvers
             for (int i = 1; i < N; i++)
             {
                 k1 = f(t, y0);
-                k2 = f(t, y0 + k1 + dt);
+                k2 = f(t, y0 + k1 * dt);
                 y[i] = y0 + dt * 0.5 * (k1 + k2);
                 t += dt;
                 y0 = y[i];