NAG Toolbox Chapter Introduction

X03 — inner products

This chapter is concerned with the calculation of innerproducts required by other functions within the Library.

Some Library functions require to calculate the innerproduct preferably in additional precision, but, if this is unavailable or prohibitively expensive, then in basic precision. These functions call Chapter X03 so that machine dependencies of this type can be isolated to this chapter.

Although these functions are primarily intended for use by other Library functions they may be accessed directly by you:

nag_dot_real_prec (x03aa) calculates the innerproduct for real values $c$, $x_i$ and $y_i$,

nag_dot_complex_prec (x03ab) calculates the innerproduct for complex values $c$, $x_i$ and $y_i$,