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A planar straight line embedding of a planar graph is a planar embedding in which only straight line segments are used to connect the graph vertices. Fáry (1948) showed that ...

That portion of geometry dealing with figures in a plane, as opposed to solid geometry. Plane geometry deals with the circle, line, polygon, etc.

A one-dimensional line segment where two two-dimensional faces of an n-dimensional polytope meet, also called a side.

A circular cone the centers of whose sections form a line perpendicular to the bases. When used without qualification, the term "cone" often refers to a right circular cone.

A circular cylinder the centers of whose sections form a line perpendicular to the bases. When used without qualification, the term "cylinder" often refers to a right ...

A conservative vector field (for which the curl del xF=0) may be assigned a scalar potential where int_CF·ds is a line integral.

A translation along a straight line L and a rotation about L such that the angle of rotation is proportional to the translation at each instant. Also known as a twist.

If a triangle is inscribed in a conic section, any line conjugate to one side meets the other two sides in conjugate points.

The distance a point moves due to shear divided by the perpendicular distance of a point from the invariant line.

The mean square deviation of the best local fit straight line to a staircase cumulative spectral density over a normalized energy scale.