diff --git a/year4/semester1/CT4100: Information Retrieval/notes/CT4100-Notes.pdf b/year4/semester1/CT4100: Information Retrieval/notes/CT4100-Notes.pdf
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diff --git a/year4/semester1/CT4100: Information Retrieval/notes/CT4100-Notes.tex b/year4/semester1/CT4100: Information Retrieval/notes/CT4100-Notes.tex
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--- a/year4/semester1/CT4100: Information Retrieval/notes/CT4100-Notes.tex	
+++ b/year4/semester1/CT4100: Information Retrieval/notes/CT4100-Notes.tex	
@@ -641,7 +641,7 @@ The term independence assumption is also usually adopted, i.e., that the occurre
 However, it is unlikely that 30 occurrences of a term in a document truly carries thirty times the significance of a single occurrence of that term.
 A common modification is to use the logarithm of the term frequency:
 \begin{align*}
-    \text{If } \textit{tf}_{i,d} > 0:&   \quad w_{i,d} = 1 + \log(\textit{tf}_{i,d})\\
+    \text{If } \textit{tf}_{i,d} > 0 \text{:}&   \quad w_{i,d} = 1 + \log(\textit{tf}_{i,d})\\
     \text{Otherwise:}&          \quad w_{i,d} = 0
 \end{align*}