updated description for erf

Author: xotmatrix

Computation/Probability/erf.gml

@@ -1,8 +1,8 @@
 /// @func   erf(x)
 ///
-/// @desc   Returns the value of erf(x), the "error function" or cumulative
-///         distribution function, which computes the probability that a
-///         Gaussian random number falls within a given range.
+/// @desc   Returns the probability that a Gaussian random number falls
+///         within a given range. This is known as the "error function"
+///         or cumulative distribution function.
 ///
 /// @param  {real}      x           value
 ///

Computation/Probability/erf.md

@@ -5,12 +5,7 @@ erf
 The "error function" or cumulative distribution function is encountered
 in probability and can be used to compute the probability that a
 Gaussian random number falls within a given range. This algorithm was
-taken from the article in the link given immediately below.
-
-<http://www4.ncsu.edu/unity/users/p/pfackler/www/ECG790C/accuratecumnorm.pdf>
-
-If the above link does not work, an alternate version of the same
-paper can be found below.
+taken from the article in the link given below.
 
 <http://www.codeplanet.eu/files/download/accuratecumnorm.pdf>