Erable is a
computer algebra system (CAS) for a family of Hewlett-Packard graphing scientific calculators of the
HP 40,
48 and
HP 49/50 series
The HP 49/50 series are Hewlett-Packard (HP) manufactured graphing calculators. They are the successors of the popular HP 48 series.
There are five calculators in the 49/50 series of HP graphing calculators. These calculators have both a ...
.
History
Originally named ''ALGB'' in 1993, it was developed by the French mathematician for the
HP 48SX. Over time, the system integrated a lot of functionality from another math pack for the HP 48 series,
ALG48 by
Mika Heiskanen and
Claude-Nicolas Fiechter. At some point, ''ALGB'' was renamed into ''Erable'', a French play-on-words on another CAS named
Maple
''Acer'' () is a genus of trees and shrubs commonly known as maples. The genus is placed in the family Sapindaceae.Stevens, P. F. (2001 onwards). Angiosperm Phylogeny Website. Version 9, June 2008 nd more or less continuously updated since ht ...
. Compatible with the
HP 48S,
48SX,
48G,
48G+,
48GX, Erable became one of the "must-have" software packages to be installed by advanced users of these calculators.
When
Hewlett-Packard developed the
HP 49G in 1999, the Erable and ALG48 packages became an integral part of the calculator's firmware, now just named ''HP49 CAS''.
As HP CAS it also showed up in the
HP 40G,
40gs,
49g+,
48gII and
50g and was maintained by Parisse up to 2006.
Based on his experiences with Erable, Parisse started developing a new and more general CAS system named
Xcas /
Giac in 2000. It is written in
C++ rather than
System RPL
RPL is a handheld calculator operating system and application programming language used on Hewlett-Packard's scientific graphing RPN (Reverse Polish Notation) calculators of the HP 28, 48, 49 and 50 series, but it is also usable on non-RPN ca ...
. This system was integrated into the
HP Prime in 2013 under a dual-license scheme.
Versions
The last stable stand-alone version of Erable for the
HP 48 series is 3.024 (1998-08-06),
with source code as of 1998-07-14 available under the
GNU GPL
The GNU General Public License (GNU GPL or simply GPL) is a series of widely used free software licenses that guarantee end users the four freedoms to run, study, share, and modify the software. The license was the first copyleft for general ...
.
The latest beta versions for these calculators are 3.117 (1998-10-17)
and 3.201 (1999-02-07).
Parts of the CAS system for the
HP 49/50 series (version 4) were released as open-source under the
LGPL (since some parts of the CAS, which are copyrighted by Hewlett-Packard, remain proprietary software) and were maintained by Parisse up to 2006-02-02 (for firmware 2.14),
and 2006-09-19 (for firmware 2.15 (2009-04-21)
and 2.16 (2012-04-26)).
See also
*
Comparison of computer algebra systems
References
External links
*
Free computer algebra systems
Free mathematics software
Mathematical software
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