diff --git a/30_Thesis/sections/40_concept.tex b/30_Thesis/sections/40_concept.tex
index c3557b3..738371b 100644
--- a/30_Thesis/sections/40_concept.tex
+++ b/30_Thesis/sections/40_concept.tex
@@ -44,8 +44,8 @@ and a user's \emph{utility function} that maps a domain value to a utility value
     \begin{split}
         u_i(d_j), \qquad \text{where}\ & u_i(d_j) \in [0,1] \\
         & d_j \in  \mathfrak{D}(j),\\
-        & 1 <= j <= m, \\
-        & 1 <= i <= n.
+        & 1 \leq j \leq m, \\
+        & 1 \leq i \leq n.
     \end{split}
 \end{equation}