calibcant/overview.txt: Mention that \kappa is the spring constant

Mom pointed out that it's best to do this explicitly.

diff --git a/src/calibcant/overview.tex b/src/calibcant/overview.tex
index 4518233ea69c020c39b1e7add231f3695d05987e..9b8c5983da924ac8d770f2391146515f37ce87ac 100644 (file)
--- a/src/calibcant/overview.tex
+++ b/src/calibcant/overview.tex
@@ -5,7 +5,8 @@ my \calibcant\ package for performing this calibration automatically.
 
 We know the energy of the cantilever's thermal vibration from the
 equipartion theorem (\cref{eq:equipart,sec:cantilever-calib:intro}).
-Solving the equipartition theorem for $\kappa$ yields
+Solving the equipartition theorem for the spring contant $\kappa$
+yields
 \begin{equation}
   \kappa = \frac{k_BT}{\avg{x^2}} \;, \label{eq:equipart_k}
 \end{equation}