Mathematical Support

LINEAR SYSTEMS

ROUTINE	DESCRIPTION
CHFAC	Cholesky factorization R^TR of a nonnegative definite matrix.
GIRTS	Solves a triangular linear system given R.
MCHOL	Modified Cholesky factorization.

SPECIAL FUNCTIONS

ROUTINE	DESCRIPTION
AMILLR	Mill's ratio.
ENOS	Expected value of a normal order statistic.

NEAREST NEIGHBORS

ROUTINE	DESCRIPTION
NGHBR	Searches a k-d tree for the m nearest neighbors.
QUADT	Forms a k-d tree.

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