--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/+time/Magnus4.m	Fri Jun 02 17:46:01 2017 +0200
@@ -0,0 +1,43 @@
+classdef Magnus4 < time.Timestepper
+    properties
+        D
+        S
+        F
+        k
+        t
+        v
+        m
+        n
+    end
+
+
+    methods
+        function obj = Magnus4(D, k, t0, v0)
+            obj.D = D;
+            obj.k = k;
+            obj.t = t0;
+            obj.v = v0;
+            obj.m = length(v0);
+            obj.n = 0;
+        end
+
+        function [v,t] = getV(obj)
+            v = obj.v;
+            t = obj.t;
+        end
+
+        function obj = step(obj)
+            obj.v = time.expint.Magnus_4(obj.v,obj.D, obj.t, obj.k);
+            obj.t = obj.t + obj.k;
+            obj.n = obj.n + 1;
+        end
+    end
+
+
+    methods (Static)
+        function k = getTimeStep(lambda)
+            k = rk4.get_rk4_time_step(lambda);
+        end
+    end
+
+end
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