Introduction to physical-mathematical free software

Abstract

Nowadays there are excelent free softwares available to many activities in science, in teaching and even to productivity. Among those, there are powerful physical mathematical softwares. In order to motivate teachers and students, in all levels, and researchers to deal with those tools, the GNU/OCTAVE software, that works in principle with numerical calculus, GNU/MAXIMA software, that also works with symbolic computation, OPENDX, for scientific visualization, and RCS, a system for revised version, are presented. Except for the last tool, the other tools can create graphics and allow, with the increasing ability of the interested user, to reach advanced programming levels and sophisticated graphical uses.