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<p>It is named after French <a href="page.php?w=mathematician">mathematician</a> <a href="page.php?w=Jean_Gaston_Darboux">Jean Gaston Darboux</a>.</p>

<p><big>Darboux frame of an embedded curve</big></p>
<p>Let S be an oriented surface in three-dimensional Euclidean space <b>E</b><sup>3</sup>.  The construction of Darboux frames on S first considers frames moving along a curve in S, and then specializes when the curves move in the direction of the <a href="page.php?w=principal_curvatures">principal curvatures</a>.</p>

<p><big>Definition</big></p>
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