parabolic umbilic

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• Katastrophentheorie (Mathematik) — Die mathematische Katastrophentheorie beschäftigt sich mit unstetigen, sprunghaften Veränderungen von bestimmten dynamischen Systemen. Diese können, auch wenn sie unter bestimmten Voraussetzungen einen stabilen Zustand anstreben, bei Änderungen… …   Deutsch Wikipedia

• Catastrophe theory — This article refers to the study of dynamical systems. For other meanings, see catastrophe. In mathematics, catastrophe theory is a branch of bifurcation theory in the study of dynamical systems; it is also a particular special case of more… …   Wikipedia

• The Swallow's Tail — Infobox Painting| backcolor=#FBF5DF painting alignment=right image size=300px title=The Swallow s Tail Series on Catastrophes artist=Salvador Dalí year=1983 type=Oil on canvas height=73 width=92.2 height inch=28.74 width inch =36.30 diameter cm …   Wikipedia

• Principal curvature — Saddle surface with normal planes in directions of principal curvatures In differential geometry, the two principal curvatures at a given point of a surface are the eigenvalues of the shape operator at the point. They measure how the surface… …   Wikipedia

• Umbilical point — In the differential geometry of surfaces in three dimensions, umbilics or umbilical points are points which are locally spherical. At such points both principal curvatures are equal, and every tangent vector is a principal direction . Umbilic… …   Wikipedia