Émile Lemoine
...that French geometer Émile Lemoine proposed a system of five operations to measure the "complexity" of compass and straightedge constructions?
...that <a href="./French_people" id="mwFVE" rel="mw:WikiLink" title="French people">French</a> <a class="mw-redirect" href="./Geometer" id="mwFVI" rel="mw:WikiLink" title="Geometer">geometer</a> <b id="mwFVM"><a href="./Émile_Lemoine" id="mwFVQ" rel="mw:WikiLink" title="Émile Lemoine">Émile Lemoine</a></b> proposed a system of five operations to measure the "complexity" of <a class="mw-redirect" href="./Compass_and_straightedge_constructions" id="mwFVU" rel="mw:WikiLink" title="Compass and straightedge constructions">compass and straightedge constructions</a>?