Update

Author: scheinerman

README.md

@@ -1,14 +1,16 @@
 # LinearAlgebraX
 
-
-
-
 This module implements basic linear algebra methods for matrices
 with exact entries (e.g., `Rational{Int}` values).  The function names
 typically match the standard ones in Julia but with an `x` (for "exact")
 appended.
 
+The functions in this module work for all types of `Integer`, `Rational`, and `Mod`
+entries in matrices. Other exact numbers may work as well, but are not tested. 
 
+As the goal of this module is always to give exact answers but, at the same time,
+be type stable, the results of many of these functions are `big`. That is, the `detx`
+of an integer matrix has entries of type `BigInt`. 
 
 ## Functions