David H. Bailey

"Computo ergo sum."

Chief Technologist, Computational Research Dept.
Lawrence Berkeley National Laboratory

Blog

The new "Math Drudge" blog is now online. It contains essays, philosophical musings, interesting quotes and exercises, all in the realm of mathematics, computing and scientific research: Blog

Books

I have written three books on computational and experimental mathematics, and a CD-ROM reference. Further information is available in the Books website: http://www.experimentalmath.info/books

CS267

Myself and others in the LBNL Computational Research Department often participate in the U.C. Berkeley course "Applications of Parallel Computing" (CS267). The lecture notes and related materials for the most recent edition of this course (2008) are available here: CS267

Experimental Mathematics

I have published numerous research studies in the area of "experimental" (computer-assisted) mathematics, which establish that modern high-performance computer technology can be effectively utilized as a tool for mathematical research. Here are some links with additional information:

High-Precision Software Library

I am a co-author of an extensive library for high-precision computation. This library includes translation facilities so that one can use, with minor modification, ordinary Fortran or C programs to perform these operations. An "Experimental Mathematician's Toolkit", an interactive tool, is also now available: http://crd.lbl.gov/~dhbailey/mpdist.

Online Papers

Online copies of over 100 technical papers are available here: http://crd.lbl.gov/~dhbailey/dhbpapers

Online Talks

Online copies of many of my recent lectures are available here: http://crd.lbl.gov/~dhbailey/dhbtalks

Performance Engineering Research Institute (PERI)

I am co-leading a multi-institution, DOE-funded research program in performance analysis and modeling for scientific computing. Software, papers, talks and other material are available here: http://www.peri-scidac.org

Personal Websites

Some papers, photos and other materials not related to my official duties at LBNL are available at these websites:

http://www.dhbailey.com
http://www.sciencemeetsreligion.org

DISCLAIMER: These two sites are owned and operated by DHB. Neither the LBNL, the University of California nor the Department of Energy supports or endorses any of this material.

Photos

Pi

In 1996, Peter Borwein (brother of Jonathan Borwein), Simon Plouffe and I co-authored a paper that presents a new formula for pi:

This formula, now known as the "BBP formula for pi", permits one to compute the n-th binary or hexadecimal digit of pi, without computing the first n-1 digits, by means of a simple scheme that requires very little memory. It was discovered by Simon Plouffe using a computer program of mine that implements Helaman Ferguson's "PSLQ" algorithm. More recently, Richard Crandall and I have shown that there is a connection between the new pi formula and the centuries-old question of normality (ie, statistical randomness of digits in a certain sense) of pi and various other math constants. This work has been featured in recent Science News and Scientific American articles:

Resume

A detailed curriculum vitae (resume), including a list of publications, is available here: PDF.

Websites of Interest