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13 Is there a geometric explanation for why principal curvature directions are orthogonal? Oct 12 '11
6 Proof that vector area is a boundary integral? Oct 21 '11
4 Proof that vector area is a boundary integral? Oct 27 '11
3 Do the maximum and minimum values of a Laplacian eigenfunction have the same magnitude? Sep 16 '11
1 Fitting a quadratic polynomial of a special form Nov 20 '11
1 Add vector on vector's tip and rotation Nov 15 '12