* Joerg Arndt <arndt@jjj.de> [Aug 31. 2011 19:09]:
* Bill Gosper <billgosper@gmail.com> [Aug 31. 2011 13:17]:
[...]
Eqn 6 in the paper is wrong. That's not "Jackson's derivative", unless the author means Jesse's or Michael's.
http://en.wikipedia.org/wiki/Q-derivative says "The q-derivative is also known as the Jackson derivative."
(I never heard that name before, though).
And NOW I see: Cieslinsky has ( f(q*z) - f(q) ) / ( q*z - z ) but that should be ( f(q*z) - f(z) ) / ( q*z - z ). ^ ^ ^ | OMG, a typo !!11!!12 Let's call that the Michealala Jesse James's derivative-oid of the fifth kind (possibly useful for quantum chromium dynamics in triply bretzeled(*) space time), OK? (*) that time has to be salted, and served with beer.