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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
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<HTML>
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<!-- This HTML file has been created by texi2html 1.52
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     from fftw.texi on 18 May 1999 -->
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<TITLE>FFTW - Acknowledgments</TITLE>
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</HEAD>
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<BODY TEXT="#000000" BGCOLOR="#FFFFFF">
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Go to the <A HREF="fftw_1.html">first</A>, <A HREF="fftw_6.html">previous</A>, <A HREF="fftw_8.html">next</A>, <A HREF="fftw_10.html">last</A> section, <A HREF="fftw_toc.html">table of contents</A>.
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<P><HR><P>
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<H1><A NAME="SEC73">Acknowledgments</A></H1>
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<P>
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Matteo Frigo was supported in part by the Defense Advanced Research
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Projects Agency (DARPA) under Grants N00014-94-1-0985 and
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F30602-97-1-0270, and by a Digital Equipment Corporation Fellowship.
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Steven G. Johnson was supported in part by a DoD NDSEG Fellowship, an
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MIT Karl Taylor Compton Fellowship, and by the Materials Research
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Science and Engineering Center program of the National Science
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Foundation under award DMR-9400334.
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<P>
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Both authors were also supported in part by their respective
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girlfriends, by the letters "Q" and "R", and by the number 12.
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<A NAME="IDX343"></A>
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<P>
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We are grateful to SUN Microsystems Inc. for its donation of a cluster
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of 9 8-processor Ultra HPC 5000 SMPs (24 Gflops peak). These machines
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served as the primary platform for the development of earlier versions
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of FFTW.
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<P>
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We thank Intel Corporation for donating a four-processor Pentium Pro
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machine.  We thank the Linux community for giving us a decent OS to run
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on that machine.
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<P>
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The <CODE>genfft</CODE> program was written using Objective Caml, a dialect of
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ML.  Objective Caml is a small and elegant language developed by Xavier
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Leroy.  The implementation is available from <CODE>ftp.inria.fr</CODE> in the
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directory <CODE>lang/caml-light</CODE>.  We used versions 1.07 and 2.00 of the
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software.  In previous releases of FFTW, <CODE>genfft</CODE> was written in
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Caml Light, by the same authors.  An even earlier implementation of
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<CODE>genfft</CODE> was written in Scheme, but Caml is definitely better for
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this kind of application.
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<A NAME="IDX344"></A>
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<A NAME="IDX345"></A>
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<A NAME="IDX346"></A>
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<P>
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FFTW uses many tools from the GNU project, including <CODE>automake</CODE>,
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<CODE>texinfo</CODE>, and <CODE>libtool</CODE>.
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<P>
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Prof. Charles E. Leiserson of MIT provided continuous support and
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encouragement.  This program would not exist without him.  Charles also
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proposed the name "codelets" for the basic FFT blocks.
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<P>
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Prof. John D. Joannopoulos of MIT demonstrated continuing tolerance of
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Steven's "extra-curricular" computer-science activities.  Steven's
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chances at a physics degree would not exist without him.
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<P>
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Andrew Sterian contributed the Windows timing code.  
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<P>
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Didier Miras reported a bug in the test procedure used in FFTW 1.2.  We
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now use a completely different test algorithm by Funda Ergun that does
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not require a separate FFT program to compare against.
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<P>
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Wolfgang Reimer contributed the Pentium cycle counter and a few fixes
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that help portability.
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<P>
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Ming-Chang Liu uncovered a well-hidden bug in the complex transforms of
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FFTW 2.0 and supplied a patch to correct it.
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<P>
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The FFTW FAQ was written in <CODE>bfnn</CODE> (Bizarre Format With No Name)
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and formatted using the tools developed by Ian Jackson for the Linux
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FAQ.
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<P>
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<EM>We are especially thankful to all of our users for their
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continuing support, feedback, and interest during our development of
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FFTW.</EM>
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<P><HR><P>
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Go to the <A HREF="fftw_1.html">first</A>, <A HREF="fftw_6.html">previous</A>, <A HREF="fftw_8.html">next</A>, <A HREF="fftw_10.html">last</A> section, <A HREF="fftw_toc.html">table of contents</A>.
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</BODY>
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</HTML>