Tuesday 29 December 2009

At Play With J: 2nd edn.

The second edition of At Play With J, collected from Eugene McDonnell’s columns for Vector, has been published at Lulu.com.

Here in one volume are Eugene McDonnell’s 41 excellent articles published between 1993 and 2006. They form a series of straightforward but profound mathematical investigations which are not only entertaining but expand the mind.

The classical tradition founded by Fermat and Gauss mystifies the mathematical art by concealing the way in which the investigator found the solution in the first place. Trainee researchers will gain reassurance from the fact that the author does not shy away from expressing perplexity and puzzlement along the often rocky road to a solution. As such it constitutes a unique masterclass in how to do mathematical research.

The second edition has been produced by a team of J experts, revising and reworking the examples to correspond to best practice with J 6.02. With prefaces by Roger Hui and Chris Burke.

The first edition reproduced the original Vector articles with only minor amendments. But J evolved over the many years during which McDonnell wrote his column, and in the latest version of J not all the examples work as they were given. The first edition is of largely historical interest.

Wednesday 16 December 2009

Kx, Kbd+ User Group Meeting NYC Dec 2009

I had a wonderful time at the Kdb+ User Group Meeting last week in NYC.

Remember this guy? He was there... Simon Garland!

The stories from the trip are still coming out on the blog and the photos are posted in Flickr !

Wednesday 9 December 2009

Grammar for pandas

In the latest J-ottings column, just posted to Vector, Norman Thomson mixes it with pandas, shoots and leaves. See Punctuation and rank

Sunday 6 December 2009

Graduation of mortality

Just posted at Vector: Jan Karman starts a series of articles on financial mathematics in q with Graduation of mortality

Combining far faster

In a new article posted at Vector, R.E. Boss harvests new insights from generating combinations faster in J.

Rediscovering APL’s history

A new article posted at Vector recounts Catherine Lathwell’s talk to APL BUG about her documentary film project.

Saturday 5 December 2009

APL2000 announces 2010 conference

Springtime in Washington with APL2000

APL2000 User Conference - April 26-27, 2010


Plan to join the APL community as we gather in our Nation's capital to focus on the latest developments in APL2000 software. Attend informative presentations, engage in stimulating discussions, and enjoy the camaraderie of spending a few days with fellow APL enthusiasts. Special weekend hotel rates will be available to conference attendees who arrive early.
SAVE THE DATE

Mark your calendar for the APL2000 User Conference

April 26-27, 2010
The APL2000 Team looks forward to seeing you in April.

Sonia Beekman

Director of Sales & Marketing
APLNow LLC dba APL2000
One Research Court, Suite 140
Rockville, MD 20850
Phone: 301-208-7150
Fax: 301-208-7151
E-mail: sonia.beekman@apl2000.com

www.apl2000.com