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Given a group action G×F->F and a principal bundle pi:A->M, the associated fiber bundle on M is pi^~:A×F/G->M. (1) In particular, it is the quotient space A×F/G where ...

A collection B of subsets of a set X forming a topological basis.

One baud is defined as the state of a signal in a communication channel changing once per second.

A convex planar domain in which the minimal generalized diameter is >1 always contains a circle of radius 1/3.

Given the functional (1) find in a class of arcs satisfying p differential and q finite equations phi_alpha(y_1,...,y_n;y_1^',...,y_n^')=0 for alpha=1,...,p ...

A canonical brick is a 1×2×4 cuboid.

Let X_1,X_2 subset P^2 be cubic plane curves meeting in nine points p_1, ..., p_9. If X subset P^2 is any cubic containing p_1, ..., p_8, then X contains p_9 as well. It is ...

A geometric figure which touches only the vertices (or other extremities) of another figure.

The clique graph of a given graph G is the graph intersection of the family of cliques of G. A graph G is a clique graph iff it contains a family F of complete subgraphs ...

The clove hitch is the hitch illustrated above that is also called the boatman's knot or peg knot.