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An algorithm which isolates roots in the complex plane by generalizing one-dimensional bracketing.

One of the four regions of the plane defined by the four possible combinations of signs (+,+), (+,-), (-,+), and (-,-) for (x,y).

An object is reflexible if it is superposable with its image in a plane mirror. Also called amphichiral.

The slope-intercept form of a line in the Cartesian plane is given by y=mx+b, where b is the y-intercept and m is the slope.

A square grid is a grid formed by tiling the plane regularly with squares.

A parallel of a surface of revolution is the intersection of the surface with a plane orthogonal to the axis of revolution.

The contact angle between a sphere and a tangent plane is the angle alpha between the normal to the sphere at the point of tangency and the basal plane with respect to which ...

An origami configuration that can be pressed to a plane figure without crumpling it or adding new creases.

A square with side lengths 1. The unit square usually means the one with coordinates (0, 0), (1, 0), (1, 1), (0, 1) in the real plane, or 0, 1, 1+i, and i in the complex ...

A link L is said to be splittable if a plane can be embedded in R^3 such that the plane separates one or more components of L from other components of L and the plane is ...