\noindent\nbpdfSubsubsection{Snips/Goeritz/1.pdf}

Formulas follow Gordon-Litherland. For checkerboard colouring, the region to the right of an odd-numbered arc is declared to be black.

\includegraphics[width=\linewidth]{GoeritzConventions.pdf}

\noindent\nbpdfInput{Snips/Goeritz/2.pdf}

{\red\bf To do.} Tristram-Levine and Alexander in this language.