lie-algebras-and-their-representations

diff --git a/sections/complete-reducibility.tex b/sections/complete-reducibility.tex
@@ -86,7 +86,7 @@ this is not always the case. For instance\dots
   is a representation of the Lie algebra \(K[x]\). Notice \(V\) has a single
   nonzero proper subrepresentation, which is spanned by the vector \((1, 0)\).
   This is because if \((a + b, b) = \rho(x) \ (a, b) = \lambda (a, b)\) for
-  some \(\lambda \in \mathbb{C}\) then \(\lambda = 1\) and \(b = 0\). Hence \(V\) is
+  some \(\lambda \in K\) then \(\lambda = 1\) and \(b = 0\). Hence \(V\) is
   indecomposable -- it cannot be broken into a direct sum of 1-dimensional
   subrepresentations -- but it is evidently not irreducible.
 \end{example}