DNRM2 returns the euclidean norm of a vector via the function name, so that DNRM2 := sqrt( x'*x )
N is INTEGER number of elements in input vector(s)
X is DOUBLE PRECISION array, dimension ( 1 + ( N - 1 )*abs( INCX ) )
INCX is INTEGER storage spacing between elements of DX
Univ. of California Berkeley
Univ. of Colorado Denver
-- This version written on 25-October-1982. Modified on 14-October-1993 to inline the call to DLASSQ. Sven Hammarling, Nag Ltd.
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