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<H1>shell sort</H1>
<P>
(algorithm)

<P>
<strong>Definition:</strong>
A <a href="diminish.html" tppabs="http://hissa.nist.gov/dads/HTML/diminish.html"><em>diminishing increment sort</em></a> where the first increment is the smallest power of 2 less than half the number of items to be sorted (2<sup> floor(  log<sub>2</sub>n ) -1</sup>) and each succeeding increment is half.
<P><em>Note:
Invented by Donald Lewis Shell [CACM, July, 1959, pages 30-32].</em>
<P>Author: <a href="terms.html#authorASK" tppabs="http://hissa.nist.gov/dads/terms.html#authorASK">ASK</a>
<H2>Implementation</H2>
<A HREF="javascript:if(confirm('http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.cs.ubc.ca/spider/harrison/Java/ShellSortAlgorithm.java  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.cs.ubc.ca/spider/harrison/Java/ShellSortAlgorithm.java'" tppabs="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.cs.ubc.ca/spider/harrison/Java/ShellSortAlgorithm.java">(Java)</A>, <A HREF="javascript:if(confirm('http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.auto.tuwien.ac.at/%7Eblieb/woop/shell.html  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.auto.tuwien.ac.at/%7Eblieb/woop/shell.html'" tppabs="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.auto.tuwien.ac.at/%7Eblieb/woop/shell.html">(ADA dialect)</A>.
<H2>More information</H2>
<A HREF="javascript:if(confirm('http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.cs.ubc.ca/spider/harrison/Java/sorting-demo.html  \n\nThis file was not retrieved by Teleport Pro, because it is addressed on a domain or path outside the boundaries set for its Starting Address.  \n\nDo you want to open it from the server?'))window.location='http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.cs.ubc.ca/spider/harrison/Java/sorting-demo.html'" tppabs="http://www.nist.gov/cgi-bin/exit_nist.cgi?url=http://www.cs.ubc.ca/spider/harrison/Java/sorting-demo.html">demonstration</A>.

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<p>
Entry modified Fri Jul 16 10:02:26 1999.<BR>
HTML page formatted Wed Dec 22 09:36:28 1999.

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