cuspidal point

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• cuspidal point — noun mathematics 1. : cusp 2b 2. : a point on a ruled surface where a generator or ruling intersects a consecutive ruling …   Useful english dictionary

• Cuspidal — Cus pi*dal ( p? dal), a. [From L. cuspis, cuspidis. See {Cusp}.] Ending in a point. [1913 Webster] …   The Collaborative International Dictionary of English

• cuspidal edge — Regression Re*gres sion (r?*gr?sh ?n), n. [L. regressio: cf. F. r[ e]gression.] The act of passing back or returning; retrogression; retrogradation. Sir T. Browne. [1913 Webster] {Edge of regression} (of a surface) (Geom.), the line along which a …   The Collaborative International Dictionary of English

• cuspidal — /kus pi dl/, adj. of, like, or having a cusp; cuspidate. [1640 50; < L cuspid (s. of cuspis) point + AL1] * * * …   Universalium

• cuspidal cubic — noun : a plane cubic of the third class with one cusp, one point of inflexion, and no node …   Useful english dictionary

• Pinch point (mathematics) — Section of the Whitney umbrella, an example of pinch point singularity. In geometry, a pinch point or cuspidal point is a type of singular point on an algebraic surface. The equation for the surface near a pinch point may be put in the form where …   Wikipedia

• Regression point — Regression Re*gres sion (r?*gr?sh ?n), n. [L. regressio: cf. F. r[ e]gression.] The act of passing back or returning; retrogression; retrogradation. Sir T. Browne. [1913 Webster] {Edge of regression} (of a surface) (Geom.), the line along which a …   The Collaborative International Dictionary of English

• Cardioid/Proofs — TheoremThe curve defined by the parametric equations : x(t) = 2 r left( cos t {1 over 2} cos 2 t ight), qquad qquad (1) : y(t) = 2 r left( sin t {1 over 2} sin 2 t ight) qquad qquad (2) has the same shape as the curve defined in polar coordinates …   Wikipedia

• Langlands program — The Langlands program is a web of far reaching and influential conjectures that connect number theory and the representation theory of certain groups. It was proposed by Robert Langlands beginning in 1967. Connection with number theory The… …   Wikipedia

• Affine focal set — In mathematics, and especially affine differential geometry, the affine focal set of a smooth submanifold M embedded in a smooth manifold N is the caustic generated by the affine normal lines. It can be realised as the bifurcation set of a… …   Wikipedia

• List of mathematics articles (C) — NOTOC C C closed subgroup C minimal theory C normal subgroup C number C semiring C space C symmetry C* algebra C0 semigroup CA group Cabal (set theory) Cabibbo Kobayashi Maskawa matrix Cabinet projection Cable knot Cabri Geometry Cabtaxi number… …   Wikipedia