deletions | additions       diff --git a/User Models and Templates.tex b/User Models and Templates.tex  index f56d819..c82b432 100644  --- a/User Models and Templates.tex  +++ b/User Models and Templates.tex 
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\subsection{Custom Python Functions}  Iris accepts custom models written as Python functions saved in *.py files. Any number of functions can be written in the file. The function must take two parameters: the first is an iterable of the model parameters, the second is a placeholder for the spectral axis, 'x.' One caveat is that the spectral data (x) must be in terms of Angstroms. For example, a model file for a modified black body  \[B_{\nu}(T) (\nu/\nu_{0})^{\beta}\] \(B_{\nu}(T) \left(\frac{\nu}{\nu_{0}}\right)^{\beta}\)  could be defined as in Figure \ref{fig:user_model_example}. User models can be arbitrarily combined with other custom or preset model functions.  \subsection{Table Models}