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A product space product_(i in I)X_i is compact iff X_i is compact for all i in I. In other words, the topological product of any number of compact spaces is compact. In ...

Homology is a concept that is used in many branches of algebra and topology. Historically, the term "homology" was first used in a topological sense by Poincaré. To him, it ...

If, in two solids of equal altitude, the sections made by planes parallel to and at the same distance from their respective bases are always equal, then the volumes of the ...

If two quantities A and B are approximately equal, this is written A approx B.

A polygon whose vertex angles are equal (Williams 1979, p. 32).

A fixed point for which the stability matrix has equal nonzero eigenvectors.

A plane making equal angles with the three edges of a trihedron.

The portion of the probability distribution which has a P-value equal to the observed P-value.

The relationship x precedes y is written x≺y. The relation x precedes or is equal to y is written x<=y.

A fixed point for which the stability matrix has equal negative eigenvalues.