User's Guide

This guide introduces the common types and categories provided by $\Sigma{}^{{\rm it}}$, and presupposes some familiarity with programming in ALDOR and SALLI. If you are unfamiliar with ALDOR or SALLI, we suggest that you first go through the tutorial salli/tutorial/tutorial.ps, which will familiarize you both with ALDOR and SALLI.

$\Sigma{}^{{\rm it}}$ provides over 170 categories and domains, and over 600 different exported functions, which can look daunting at first. Remember however that a large part of those are low-level functionalities that make it possible to programmers to write efficient applications. Most of the high-level functionalities are found in a small subset of types and those are the ones described in this short guide. As you become more familiar with $\Sigma{}^{{\rm it}}$, you will find the reference guide to be more useful when browsed on line with xdvi.

As you learn programming with $\Sigma{}^{{\rm it}}$, make sure to check the sumit/samples directory for various programming samples.