diff --git a/heun.py b/heun.py
index f36bfe9..2b8eaab 100644
--- a/heun.py
+++ b/heun.py
@@ -1,25 +1,4 @@
 # Verfahren von Heun zur numerischen Lösung von Anfangswertaufgaben.
-#
-#def heun(xk,yk,h,ys):
-#    xk1 = xk + h
-#    yk1p = yk + h * ys(xk,yk)
-#    yk1 = 0.5*(yk+yk1p+h*ys(xk1,yk1p))
-#    return (xk1,yk1p)
-#
-#def run_heun(K,h,x0,y0,ys):
-#    if not isinstance(ys,list): ys = [ys]
-#    if not isinstance(y0,list): y0 = [y0]
-#    xk = x0
-#    yk = y0
-#    xks = x0
-#    yks = [ [v] for v in y0 ]
-#
-#    for i in range(K):
-#        for j in range(len(ys)):
-#            xk,yk[j] = heun(xk,yk[j],h,ys[i])
-#            xks.append(xk)
-#            yks[j].append(yk[j])
-#
 
 def run_heun(K,h,x0,y0,ys):
     if not isinstance(y0,list): y0 = [y0]