David H. Bailey

"Computo ergo sum."

Senior Scientist, Computational Research Dept.
Lawrence Berkeley National Laboratory

News

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

DISCLAIMER: This site is owned by DHB and operated by DHB and his colleague Jonathan Borwein of the University of Newcastle, Australia. Neither LBNL, the University of California or the U.S. Department of Energy endorses this material.

Books

I have written one book on performance science, three books on computational and experimental mathematics, a CD-ROM reference. Further information is available in the Books website (see disclaimer above): http://www.experimentalmath.info/books

CS267

Myself and others in the LBNL Computational Research Department and the U.C. Berkeley Computer Science and Engineering Department have taught the U.C. Berkeley course "Applications of Parallel Computing" (CS267). The lecture notes and related materials for the most recent edition of this course 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 is a website with additional information: DISCLAIMER: This site is owned by DHB and operated by DHB and his colleague Jonathan Borwein of the University of Newcastle, Australia. Neither LBNL, the University of California or the U.S. Department of Energy endorses this material.

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: 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

Sustained Performance, Energy and Resilience (SUPER) Institute

I am the assistant leader of a multi-institution, DOE-funded research program encompassing high-end performance optimization, automatic performance tuning, energy-efficient computing and resilient computing. Software,papers, talks and other material are available here: http://www.super-scidac.org

Personal Websites

Some papers, photos and other materials not related to my official duties at LBNL are available at these websites: DISCLAIMER: These two sites are owned and operated by DHB. Neither LBNL, the University of California or the U.S. Department of Energy supports or endorses 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