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The brachistochrone is an inverted cycloid. You can plot one in Metapost by imagining that you are rolling a wheel along the x-axis. Here is another cycloid diagram question. prologues := 3; outputtemplate := "%j%c.eps"; beginfig(1); numeric u, r; u = 5mm; r = 4u; path xx, yy, A, B, C; xx = (left -- 8 right) scaled u; yy = (up -- 8 down) scaled u; ...


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This is an attempt to show that the spirit of what I want can be done by knowledge of basic latex programming. Here is what I came up with: \documentclass{article} \usepackage{tikz} \usepackage{ifthen} \usepackage{intcalc} \usepackage{qrcode} \begin{document} \qrcode[]{Dummy code}%Original code \vspace{1cm} %Corrupted code \begin{tikzpicture}[scale=0.1] ...



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