A quantitative measure of the simplicity of a geometric construction which reduces geometric constructions to five steps. It was devised by È. Lemoine. S_1 Place a straightedge's graph edge through a given point, S_2 Draw a straight line, C_1 Place a point of a compass on a given point, C_2 Place a point of a compass on an indeterminate point on a line, C_3 Draw a circle.
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