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The fractal curve illustrated above, with base curve and motif illustrated below.

A curve consisting of two mirror-reversed intersecting crescents (lunes). This curve can be traced unicursally. The region common to both crescents is a lens.

A nonuniform rational B-spline surface of degree (p,q) is defined by ...

The natural parametric equations of a curve are parametric equations that represent the curve in terms of a coordinate-independent parameter, generally arc length s, instead ...

A curve also known as swan-like curve or streamline. It is given by the polar equation r=atheta+b, where a>0.

A plane coordinate system whose axes are not perpendicular. The x-coordinate of a point P is the abscissa of its projection onto the x-axis in the direction of the y-axis, ...

An egg-shaped curve. Lockwood (1967) calls the negative pedal curve of an ellipse with eccentricity e<=1/2 an ovoid.

The specification of a curve, surface, etc., by means of one or more variables which are allowed to take on values in a given specified range.

The fixed point with respect to which a pedal curve or pedal triangle is drawn.

The motion along a phase curve as a function of time (Tabor 1989, p. 14).