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Given a point P, the point P^' which is the antipodal point of P is said to be the antipode of P. The term antipode is also used in plane geometry. Given a central conic (or ...

A fixed point for which the stability matrix has both eigenvalues negative, so lambda_1<lambda_2<0.

A fixed point for which the stability matrix has both eigenvalues positive, so lambda_1>lambda_2>0.

The pedal of a curve C with respect to a point O is the locus of the foot of the perpendicular from O to the tangent to the curve. More precisely, given a curve C, the pedal ...

When the Gaussian curvature K is everywhere negative, a surface is called anticlastic and is saddle-shaped. A surface on which K is everywhere positive is called synclastic. ...

An interval into which a given data point does or does not fall.

Not continuous. A point at which a function is discontinuous is called a discontinuity, or sometimes a jump.

The head of a vector AB^-> is the endpoint B, i.e., the point at which the arrow is placed.

A fixed point for which the stability matrix has equal nonzero eigenvectors.

A point at which two polygon edges of a polygon meet.