The Singular reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Singular

When used as a simple adjective in English, singular usually means unique.

The singular is one of two grammatical numbers in English; the other is the plural.

In mathematics, a square matrix is called singular if it is not invertible.

In complex analysis, a singular point of a function f is a point such that f is analytic in its neighbourhood but not at it. See mathematical singularity.

See also gravitational singularity.

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