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The simplicial complex formed from a family of objects by taking sets that have nonempty intersections.

The Nevanlinna Prize is awarded by the International Mathematical Union to outstanding contributors to the mathematical aspects of information science. The International ...

Approximates the possible values of y in terms of x if sum_(i,j=0)^na_(ij)x^iy^j=0.

Given two starting numbers (a_1,a_2), the following table gives the unique sequences {a_i} that contain no three-term arithmetic progressions. Sloane sequence A003278 1, 2, ...

An algebraic surface of degree 9. Enneper's minimal surface is an example of a nonic surface.

A quantity that is nonzero everywhere is said to be nonvanishing. For instance, the values of x^2+1 are nonvanishing for real x, while those of x^2 are not (since x^2 ...

A vector space possessing a norm.

A function f:A->B such that B is a set of numbers.

An angle which is not a right angle or a multiple of a right angle.

An 80-sided polygon.