On 8/31/2011 11:30 AM, Joerg Arndt wrote:
* 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?
Bretzeled or pretzeled(*)?
(*) that time has to be salted, and served with beer.
(*) I quite like salted pretzels.
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