From e1559fe5e1a986d1424f2f760f9f205e786a5af3 Mon Sep 17 00:00:00 2001
From: Yoonku Hwang <yz0624@gmail.com>
Date: Wed, 18 May 2016 10:50:42 +0900
Subject: [PATCH] add comment for ab4

---
 src/Numerics/OdeSolvers/AdamsBashforth.cs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/Numerics/OdeSolvers/AdamsBashforth.cs b/src/Numerics/OdeSolvers/AdamsBashforth.cs
index 39904dc9..c9b7d2d4 100644
--- a/src/Numerics/OdeSolvers/AdamsBashforth.cs
+++ b/src/Numerics/OdeSolvers/AdamsBashforth.cs
@@ -92,6 +92,15 @@ namespace MathNet.Numerics.OdeSolvers
             return null;
         }
 
+        /// <summary>
+        /// Fourth Order AB Method(Require two initial guesses)
+        /// </summary>
+        /// <param name="y0">Initial value 1</param>
+        /// <param name="start">Start Time</param>
+        /// <param name="end">End Time</param>
+        /// <param name="N">Number of subintervals</param>
+        /// <param name="f">ode model</param>
+        /// <returns></returns>
         public static double[] FourthOrder(double y0, double start, double end, int N, Func<double, double, double> f)
         {
             double dt = (end - start) / (N - 1);