section 3 editing

1 files changed, 1 insertions, 1 deletions

diff --git a/Fourier Series.page b/Fourier Series.page
index 4e5b610..37c7dd0 100644
--- a/Fourier Series.page
+++ b/Fourier Series.page
@@ -80,7 +80,7 @@ Summing these two functions we get the following:
   
 #What is the Fourier series actually?</b>
 Now, to begin proving that the Fourier series is a true fact let us begin with the following hypothesis:
-Let $f : \mathbb I \rightarrow \mathbb C$ be a continuous, periodic function where I is some the time interval(period of the function). Then it can be expressed as : 
+Let $f : \mathbb I \rightarrow \mathbb C$ be a continuous, periodic function where $I$ is some the time interval(period of the function). Then it can be expressed as : 
   
 $$
 \begin{array}{ccl}