Last-known email addresses mangled in an obvious way.

Original/primary authors

Ayal Pinkus apinkus “AT” xs4all “DOT” nl

This project was started by Ayal Pinkus who remains the main author and the primary maintainer.

Serge Winitzki serge “AT” cosmos “DOT” phy “DOT” tufts “DOT” edu

Added factorials over rationals, TeXForm, did a major overhaul of the introduction manual (actually, he wrote large part of the manual as it is), and initiated numerous improvements and test code for Yacas, and implemented yacas_client. Actually, Serge has been one of the larger contributors, and the main force behind the improved documentation.

Jitse Niesen jn221 “AT” damtp “DOT” cam “DOT” ac “DOT” uk

Reported some bugs, helped improve various parts of Yacas, and greatly improved the manual for Yacas.


Grzegorz Mazur teoretyk “AT” gmail “DOT” com


Jim Apple japple “AT” freeshell “DOT” org

Reported bugs and supplied improved code for gcc 3.3.4

Mark Arrasmith arrasmith “AT” math “DOT” twsu “DOT” edu

Helped greatly in setting up the fltk-based graphicaluser interface, and fixed some bugs relating to limits regarding infinity.

Fred Bacon bacon “AT” aerodyne “DOT” com

Fixed some compiler errors on the newer gcc compiles. Reported some important bugs.

Jay Belanger belanger “AT” truman “DOT” edu

Reported some bugs and improved some of the GnuPlot code. He also wrote the yacas.el file, which allows you to run yacas from within emacs.

Roberto Colistete Junior

Is maintaining a version of Yacas for SymbianOS.

Sebastian Ferraro sferraro “AT” criba “DOT” edu “DOT” ar

Reported bugs and supplied improved code (determinants).

John Fremlin

Added some code for fast calculation of roots of a cubic polynomial.

Peter Gilbert peterdgilbert “AT” gmail “DOT” com

Made many improvements to the C++ code to make it conform more to standard C++ coding conventions (class interfaces looking more like stl), improved the regression test suite.

James Gilbertson azurite “AT” telusplanet “DOT” net

Win32 port, improved error reporting. Added initial version of Karatsuba multiplication, and added some matrix functions to the math library.

Gabor Grothendieck

Gabor is the maintainer of Ryacas, and gave valuable feedback on the new web site.

Rene Grothmann 2004 “AT” rene-grothmann “DOT” de

Married Euler to Yacas.

Franz Hack franz.hack “AT” web “DOT” de

Supplied a Delphi interface to the Yacas DLL.

Ingrid Halters

Helped improve the ease of use of the Yacas web site.

Mark Hatsell mark “AT” autograph-maths “DOT” com

Made the server code work on Windows.

Joris van der Hoeven TeXmacs “AT” math “DOT” u-psud “DOT” fr

Helped with texmacs support.

Wolfgang Hšnig pocket_software “AT” web “DOT” de

Created a port of Yacas that runs on PocketPC, to be found here.

Daniel Richard G. straker “AT” MIT “DOT” EDU

Added autoconf/automake scripts, made Sun/Sgi compilation possible, created a rpm spec file, many many many changes to clean up the source distribution.

Igor Khavkine

Added ‘Diverge’ and ‘Curl’, and implemented threading for the derivative operator (the gradient). Fixed GMP code.

John Lapeyre

Made some modifications to the make file, and improved some math code.

Jonathan Leto jonathan “AT” leto “DOT” net

Helped improve the integration algorithm, and helped extend the tests used for Yacas (finding numerous bugs).

Vladimir Livshits livshits “AT” cs “DOT” stanford “DOT” edu

Set up the initial sourceforge CVS repository, and updated the Windows version source code. He also greatly improved the logic theorem prover code.

Eugenia Loli

Helped build the BeOS version of Yacas.

Adolf Mathias adolf_mathias “AT” web “DOT” de

Grzegorz Mazur teoretyk “AT” gmail “DOT” com

Pablo De Nápoli pdenapo “AT” yahoo “DOT” com

Fixed the configure script so Yacas compiles under cygwin.

Gopal Narayanan gopal “AT” debian “DOT” org

Debian package maintainer. Made a man page for Yacas.

Marta Noga marta.noga “AT” gmail “DOT” com

Christian Obrecht christian “DOT” obrecht “AT” wanadoo “DOT” fr

Made a much better Limit, and made Yacas behave better at infinity.

Alberto González Palomo

Implemented a console-mode version of Yacas for AgendaVR. Changed the directory structure for the script files, and implemented initial support for OpenMath.

Doreen Pinkus d “DOT” pinkus “AT” hccnet “DOT” nl

Designed the second version of the Web site for Yacas.

Mike Pinna mike “AT” autograph-maths “DOT” com

Applied some bug fixes.

Savario Prinz yacas “AT” mac “DOT” com

Built a fantastic Mac version of Yacas.

Dirk Reusch

Added some linear algebra functions, and fixed some predicate functions.

Daniel Rigby

Brought a client-server structure to the EPOC32 version of Yacas.

Juan Pablo Romero jpablo_romero “AT” hotmail “DOT” com

Reported many bugs, made many suggestions for improvements, and supplied improved code (yacas scripts and makefile code).

Robert V Schipper rvs “AT” achilles “DOT” nfia “DOT” org

Ironed out a few bugs in Yacas.


Reported an important bug in numeric calculations.

HenSiong Tan tan “AT” stat “DOT” psu “DOT” edu

Yannick Versley yannick “AT” versley “DOT” de

Sent some patches regarding bugs relating integration and differentiation.

Adrian V. qwert2003 “AT” users “DOT” sourceforge “DOT” net

Ladislav Zejda

Supplied patches to make Yacas work on Dec Alpha’s.

Andrei Zorine

Started the body of statistics code.