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\centerline{MONT 106Q -- Mathematical Thinking}
\centerline{Classifying (Uncolored) Symmetric Strip Patterns}
\centerline{November 14, 2016}
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\noindent
Here's the ``decision tree'' for the symmetric strip patterns
that I promised you:
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\begin{verbatim}
                         180 Rotation?

     
         Reflection in x-axis?         Reflection in axis?                       

                          p1m1                            pmm2

      Any reflection?                       Any reflection?
                          
                      pm11          p112             pma2   
   
    Glide Reflection?


p111                p1a1

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