X03 Chapter Contents
X03 Chapter Introduction (PDF version)
NAG Library Manual

NAG Library Chapter Introduction

X03 – Inner Products

 Contents

1  Scope of the Chapter

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

2  Background to the Problems

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

3  Recommendations on Choice and Use of Available Routines

Although these routines are primarily intended for use by other Library routines they may be accessed directly by you:
X03AAF calculates the innerproduct for real values c, xi and yi,
X03ABF calculates the innerproduct for complex values c, xi and yi,

4  Routines Withdrawn or Scheduled for Withdrawal

None.

X03 Chapter Contents
X03 Chapter Introduction (PDF version)
NAG Library Manual

© The Numerical Algorithms Group Ltd, Oxford, UK. 2016