1985 | OriginalPaper | Chapter
Legendrian singularities
Authors : V. I. Arnold, S. M. Gusein-Zade, A. N. Varchenko
Published in: Singularities of Differentiable Maps
Publisher: Birkhäuser Boston
Included in: Professional Book Archive
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Lay out along each inner normal to an ellipse a segment of length t. The free ends of these segments form a curve, called a front (of a disturbance flowing out into the ellipse in time t).