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A quantity which transforms like a tensor except for a scalar factor of a Jacobian.

The tensor defined by T^l_(jk)=-(Gamma^l_(jk)-Gamma^l_(kj)), where Gamma^l_(jk) are Christoffel symbols of the first kind.

A curve which intersects some straight line in an infinity of points (but for which not every point lies on this curve).

A transformation of period 2.

A transformation of the form A^'=UAU^(H), where U^(H) denotes the conjugate transpose.

A homogeneous ideal defining a projective algebraic variety is unmixed if it has no embedded prime divisors.

A surface represented parametrically by elliptic functions.

A general prism is a polyhedron possessing two congruent polygonal faces and with all remaining faces parallelograms (Kern and Bland 1948, p. 28; left figure). A right prism ...

The plane through an edge of a trihedron drawn perpendicularly to the opposite face. The term was first used by J. Neuberg (Altshiller-Court 1979, p. 298).

An archaic name for the torus.