[Qtfm-announce] QTFM version 2.8

[Release a. a. u. <qtf...@li...>]

A new release of the Quaternion Toolbox for Matlab (QTFM) has
been posted on Sourceforge. This is not a big release (i.e. the
changes are not major).

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                Quaternion toolbox for Matlab
                http://qtfm.sourceforge.net/
       Mailing list: qtf...@li...<mailto:qtf...@li...>
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Copyright (c) 2005-2020 Stephen J. Sangwine & Nicolas Le Bihan
Email: san...@us...<mailto:san...@us...>
       nic...@gi...<mailto:nic...@gi...>
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                     Release Notes

Version 2.8  29 February 2020

The Peirce decomposition has been implemented for octonions (trivially
since the algorithm is the same as for quaternions). (It does not work for
complex octonions.)

Trigonometric and hyperbolic functions, and a few other simple functions
such as cat, diff, ceil, floor etc., have been implemented for octonions,
using the same algorithms as for the quaternion case, or with minor changes
to make them work for octonions.

The octonion constructor will now take a pure quaternion as first argument
and a full quaternion as second argument, returning a pure octonion. The
cd (Cayley-Dickson) function, already provided, implements this construction
in reverse, splitting a pure octonion into a pure and a full quaternion.


*****************
Dr Steve Sangwine
Senior Lecturer
School of Computer Science and
        Electronic Engineering
University of Essex
Wivenhoe Park
Colchester CO4 3SQ
United Kingdom

T: (+44) (0)1206 872401
F: (+44) (0)1206 872684

http://stephen_sangwine.droppages.com/