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Any symmetric polynomial (respectively, symmetric rational function) can be expressed as a polynomial (respectively, rational function) in the elementary symmetric ...

A homogeneous polynomial in two or more variables.

A clear-cut way of describing every object in a class in a one-to-one manner.

A one-dimensional geometric object such as a pencil or line segment range.

A 1-form omega=sum_(i=1)^na_i(x)dx_i such that omega=0.

An expression built up from statements letters by appropriate application of connectives (Mendelson 1997, p. 13).

A 1-form w is said to be exact in a region R if there is a function f that is defined and of class C^1 (i.e., is once continuously differentiable in R) and such that df=w.

A tetractys, also called a tetraktys or decad, is an arrangement of 10 points in the form of a triangle with 1 point in the first row, two in the second, three in the third, ...

Sylvester's line problem, known as the Sylvester-Gallai theorem in proved form, states that it is not possible to arrange a finite number of points so that a line through ...

The modular equation of degree five can be written (u/v)^3+(v/u)^3=2(u^2v^2-1/(u^2v^2)).