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+ \put(0.19073777,0.15043969){\color[rgb]{0,0,0}\makebox(0,0)[lt]{\lineheight{1.25}\smash{\begin{tabular}[t]{l}$p_1$\end{tabular}}}}%
+ \put(0,0){\includegraphics[width=\unitlength,page=2]{pd_diag.pdf}}%
+ \end{picture}%
+\endgroup%
diff --git a/latex/figs/pd_diag.svg b/latex/figs/pd_diag.svg
new file mode 100644
index 0000000..fa0b947
--- /dev/null
+++ b/latex/figs/pd_diag.svg
@@ -0,0 +1,293 @@
+
+