Update 0-introduction.tex

blueprint/src/chapters/0-introduction.tex

@@ -262,7 +262,7 @@ \chapter{Introduction}
     \leanok
     \uses{lmm:norm_lambda}
     If $2$ were in $I$, then by definition, $\lambda$ would divide $2 \in \cc{O}_K$.
-    Recall from \Cref{lmm:norm_lambda} that the norm of $lambda$ is $3$.
+    Recall from \Cref{lmm:norm_lambda} that the norm of $\lambda$ is $3$.
     If $\lambda$ divided $2$, then by properties of divisibility in number fields,
     the norm of $\lambda$ would also divide $2$.
     However, $3$ does not divide $2$, showing a contradiction.