From 8a67341d72888aaf1ca1dce8e6a0b80c8d9d2194 Mon Sep 17 00:00:00 2001
From: Christoph Ruegg <git@cdrnet.ch>
Date: Thu, 25 Dec 2014 20:58:16 +0100
Subject: [PATCH] Docs: exponential integral function

---
 docs/content/Functions.fsx | 19 +++++++++++++++----
 1 file changed, 15 insertions(+), 4 deletions(-)

diff --git a/docs/content/Functions.fsx b/docs/content/Functions.fsx
index f9ebd7d0..21a338ac 100644
--- a/docs/content/Functions.fsx
+++ b/docs/content/Functions.fsx
@@ -49,8 +49,19 @@ $$$
 \binom{n}{k_1,k_2,\dots,k_r} = \frac{n!}{k_1! k_2! \cdots k_r!} = \frac{n!}{\prod_{i=1}^{r}k_i!}
 
 
-Gamma-related functions
------------------------
+Exponential Integral
+--------------------
+
+* `ExponentialIntegral(x,n)`
+
+Generalized Exponential Integral
+
+$$$
+E_n(x) = \int_1^\infty t^{-n} e^{-xt}\,\mathrm{d}t
+
+
+Gamma functions
+---------------
 
 #### Gamma
 * `Gamma(a)`
@@ -117,8 +128,8 @@ $$$
 \psi^{-1}(p)
 
 
-Euler Beta-related functions
-----------------------------
+Euler Beta functions
+--------------------
 
 #### Euler Beta
 * `Beta(a,b)`