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2

The circledsteps package (based on TiKZ) defines some rectangle with rounded smal sides for long terms. However, if you really want an ellipse, pstricks defines a \psovalboxfor that: \documentclass{article} \usepackage{tikz} \usepackage{circledsteps} \usepackage{pstricks} \begin{document} Needed assumptions on F, since we know $\lambda_1^*$ must lie ...


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Based on the solution you provide, why don't you use the shape library to draw an ellipse instead of a circle? \documentclass{article} \usepackage{mathtools} \usepackage{tikz} \usetikzlibrary{shapes} \makeatletter \newcommand\mathcircled[1]{% \mathpalette\@mathcircled{#1}% } \newcommand\@mathcircled[2]{% \tikz[baseline=(math.base)] \node[draw,ellipse,...


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OK, so instead of editing my previous answer (which was meant to give a hint on even odd rule with hobby closed curve, when the question was very unclear), I add a new one which I would delete if it's not what OP wants. So basically, what you seem to ask for is a way to fill a clipped part of a shape, like the following: \documentclass[tikz,border=3.14mm]{...


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How about using smooth cycle with try-and-error points like this? \documentclass[tikz,border=5mm]{standalone} \begin{document} \begin{tikzpicture} \draw plot[smooth cycle] coordinates{ (-1.8,-.2) (-1.6,.5) (-1,.9) (-.3,1) (1,.7) (2,.2) (2.22,0) (2.42,-.45) (2.25,-1) (1.8,-1.18) (1.2,-1) (0,-.8) (-.9,-.9) (-1.5,-.7) }; \draw (-1.55,....


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