Search Results for ""

The Pasch graph is the Levi graph of the Pasch configuration. The Pasch graph is edge-transitive but not vertex-transitive, but fails to be semisymmetric since it is not ...

A heptomino in the shape of the Greek character pi.

A braid in which strands are intertwined in the center and are free in "handles" on either side of the diagram.

((a+b)/2)^2-((a-b)/2)^2=ab.

A group of five elements, also called a quintuple or pentad.

An (n-2)-dimensional face of an n-dimensional polytope.

A list of five properties of a topological space X expressing how rich the "population" of open sets is. More precisely, each of them tells us how tightly a closed subset can ...

A translation without rotation or distortion.

Theta(G;A)=<theta(a):a in A-1> is an A-invariant solvable p^'-subgroup of G.

rho_(2s)(n)=(pi^s)/(Gamma(s))n^(s-1)sum_(p,q)((S_(p,q))/q)^(2s)e^(2nppii/q), where S_(p,q) is a Gaussian sum, and Gamma(s) is the gamma function.