1.1 Introduction

MATH1 (Mathematical Processing Sub-Package) is a collection of the most basic subroutines in the DCL (Dennou Chikyuu Library).



MATH1 consists of several sub-packages.

Most of these sub-packages can perform "missing-value handling" and "comparison of the values of real values taking into consideration the errors of the values." Of these sub-packages, only OSLIB has machine-dependency on the source level. (SYSLIB manages system-dependent constants.)

In the following chapters, brief explanations will be provided on the features of MATH1 (internal variable management, missing-value handling, and comparison including error), and also on the FORTRAN'' architecture upon which these packages are based.