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diff --git a/randvar.tex b/randvar.tex
index 6d3aae5..01007f6 100644
--- a/randvar.tex
+++ b/randvar.tex
@@ -80,10 +80,10 @@ Fran\c cois Fleuret
 
 \end{center}
 
-\underline{Random variables} are central to any model of a random
-process, but their mathematical definition is unclear to most. This is
-an attempt at giving an intuitive understanding of their definition
-and utility.
+\underline{Random variables} (RVs) are central to any model of a
+random phenomenon, but their mathematical definition is unclear to
+most. This is an attempt at giving an intuitive understanding of their
+definition and utility.
 
 \section{Modeling randomness}