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<p>
You can browse the <i>Plus</i> archive in three ways: <p>
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And don't forget you can search the whole <i>Plus</i> website using
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<A NAME="subject"><h2>Browse by subject</h2></A>
We have indexed all our feature articles, career interviews, news
stories and mystery mixes by <a
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<UL>

<LI><A HREF="./feature.html">Feature Articles</A>
-our feature articles describe applications of maths to real world problems
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- every issue we interview someone with a maths-related career,
showing the wide range of uses maths gets put to in the real world
<LI><A HREF="./news.html">News</A>
- we report on recent mathematical findings and explain the maths
underlying recent news stories in the general media
<LI><A HREF="./reviews.html">Reviews</A>
- reviews of books, CDROMs, and even plays, art exhibitions and
performances that might be of interest to the mathematically minded.
Now with </i>Plus's</i> 
<A HREF="./reviews.html">all-time favourites</a>.
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<OPTION VALUE="39" SELECTED>Issue 39: June 06</OPTION>
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<OPTION VALUE="37">Issue 37: Dec 05</OPTION>
<OPTION VALUE="36">Issue 36: Sep 05</OPTION>
<OPTION VALUE="35">Issue 35: May 05</OPTION>
<OPTION VALUE="34">Issue 34: Mar 05</OPTION>
<OPTION VALUE="33">Issue 33: Jan 05</OPTION>
<OPTION VALUE="32">Issue 32: Nov 04</OPTION>
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<OPTION VALUE="19">Issue 19: Mar 02</OPTION>
<OPTION VALUE="18">Issue 18: Jan 02</OPTION>
<OPTION VALUE="17">Issue 17: Nov 01</OPTION>
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<OPTION VALUE="15">Issue 15: Jun 01</OPTION>
<OPTION VALUE="14">Issue 14: Mar 01</OPTION>
<OPTION VALUE="13">Issue 13: Jan 01</OPTION>
<OPTION VALUE="12">Issue 12: Sep 00</OPTION>
<OPTION VALUE="11">Issue 11: Jun 00</OPTION>
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<OPTION VALUE="9">Issue 9: Sep 99</OPTION>
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<OPTION VALUE="6">Issue 6: Sep 98</OPTION>
<OPTION VALUE="5">Issue 5: May 98</OPTION>
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<OPTION VALUE="3">Issue 3: Sep 97</OPTION>
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<p>
You can browse the <i>Plus</i> archive in three ways: <p>
<ul>
<li><a href="#subject">Browse by subject;</a></li>
<li><a href="#type">Browse by article type;</a> or</li>
<li><a href="#issue">Browse by issue</a></li>
</ul>
<p>
And don't forget you can search the whole <i>Plus</i> website using
the Google search in the top right corner of every page.
<p>
<A NAME="subject"><h2>Browse by subject</h2></A>
We have indexed all our feature articles, career interviews, news
stories and mystery mixes by <a
href="./indices/topic_index.html">topic</a> and <a href="./indices/keyword_index.html">keyword</a>.
<p>

<a name="type"><h2>Articles by Type</h2></a>
<UL>

<LI><A HREF="./feature.html">Feature Articles</A>
-our feature articles describe applications of maths to real world problems
<LI><A HREF="./interview.html">Career Interviews</A>
- every issue we interview someone with a maths-related career,
showing the wide range of uses maths gets put to in the real world
<LI><A HREF="./news.html">News</A>
- we report on recent mathematical findings and explain the maths
underlying recent news stories in the general media
<LI><A HREF="./reviews.html">Reviews</A>
- reviews of books, CDROMs, and even plays, art exhibitions and
performances that might be of interest to the mathematically minded.
Now with </i>Plus's</i> 
<A HREF="./reviews.html">all-time favourites</a>.
<LI><A HREF="./staff.html">Staff Room</A>
<LI><A HREF="./etc.html">Regulars</A>, including:
<UL>
<LI><A HREF="./etc.html#Puzzles">Puzzles</A>
<LI><A HREF="./etc.html#Mysteries">Mystery Mix</A>
<LI><A HREF="./etc.html#Editorials">Editorials</A>
<LI><A HREF="./etc.html#Outerspace">Outer space</A>
<LI><A HREF="./etc.html#Letters">Letters</A>
</UL>
</UL>
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<a name="issue"><h2>Browse the back issues</h2></a>
If you know what issue you would like to read again, or just want to
read past issues of <i>Plus</i>, just pick your issue and hit go!
<p>
<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0">
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<OPTION VALUE="39" SELECTED>Issue 39: June 06</OPTION>
<OPTION VALUE="38">Issue 38: Mar 06</OPTION>
<OPTION VALUE="37">Issue 37: Dec 05</OPTION>
<OPTION VALUE="36">Issue 36: Sep 05</OPTION>
<OPTION VALUE="35">Issue 35: May 05</OPTION>
<OPTION VALUE="34">Issue 34: Mar 05</OPTION>
<OPTION VALUE="33">Issue 33: Jan 05</OPTION>
<OPTION VALUE="32">Issue 32: Nov 04</OPTION>
<OPTION VALUE="31">Issue 31: Sep 04</OPTION>
<OPTION VALUE="30">Issue 30: May 04</OPTION>
<OPTION VALUE="29">Issue 29: Mar 04</OPTION>
<OPTION VALUE="28">Issue 28: Jan 04</OPTION>
<OPTION VALUE="27">Issue 27: Nov 03</OPTION>
<OPTION VALUE="26">Issue 26: Sep 03</OPTION>
<OPTION VALUE="25">Issue 25: May 03</OPTION>
<OPTION VALUE="24">Issue 24: Mar 03</OPTION>
<OPTION VALUE="23">Issue 23: Jan 03</OPTION>
<OPTION VALUE="22">Issue 22: Nov 02</OPTION>
<OPTION VALUE="21">Issue 21: Sep 02</OPTION>
<OPTION VALUE="20">Issue 20: May 02</OPTION>
<OPTION VALUE="19">Issue 19: Mar 02</OPTION>
<OPTION VALUE="18">Issue 18: Jan 02</OPTION>
<OPTION VALUE="17">Issue 17: Nov 01</OPTION>
<OPTION VALUE="16">Issue 16: Sep 01</OPTION>
<OPTION VALUE="15">Issue 15: Jun 01</OPTION>
<OPTION VALUE="14">Issue 14: Mar 01</OPTION>
<OPTION VALUE="13">Issue 13: Jan 01</OPTION>
<OPTION VALUE="12">Issue 12: Sep 00</OPTION>
<OPTION VALUE="11">Issue 11: Jun 00</OPTION>
<OPTION VALUE="10">Issue 10: Jan 00</OPTION>
<OPTION VALUE="9">Issue 9: Sep 99</OPTION>
<OPTION VALUE="8">Issue 8: May 99</OPTION>
<OPTION VALUE="7">Issue 7: Jan 99</OPTION>
<OPTION VALUE="6">Issue 6: Sep 98</OPTION>
<OPTION VALUE="5">Issue 5: May 98</OPTION>
<OPTION VALUE="4">Issue 4: Jan 98</OPTION>
<OPTION VALUE="3">Issue 3: Sep 97</OPTION>
<OPTION VALUE="2">Issue 2: May 97</OPTION>
<OPTION VALUE="1">Issue 1: Jan 97</OPTION>
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<div class="centrehighlight">
<p>
You can browse the <i>Plus</i> archive in three ways: <p>
<ul>
<li><a href="#subject">Browse by subject;</a></li>
<li><a href="#type">Browse by article type;</a> or</li>
<li><a href="#issue">Browse by issue</a></li>
</ul>
<p>
And don't forget you can search the whole <i>Plus</i> website using
the Google search in the top right corner of every page.
<p>
<A NAME="subject"><h2>Browse by subject</h2></A>
We have indexed all our feature articles, career interviews, news
stories and mystery mixes by <a
href="./indices/topic_index.html">topic</a> and <a href="./indices/keyword_index.html">keyword</a>.
<p>

<a name="type"><h2>Articles by Type</h2></a>
<UL>

<LI><A HREF="./feature.html">Feature Articles</A>
-our feature articles describe applications of maths to real world problems
<LI><A HREF="./interview.html">Career Interviews</A>
- every issue we interview someone with a maths-related career,
showing the wide range of uses maths gets put to in the real world
<LI><A HREF="./news.html">News</A>
- we report on recent mathematical findings and explain the maths
underlying recent news stories in the general media
<LI><A HREF="./reviews.html">Reviews</A>
- reviews of books, CDROMs, and even plays, art exhibitions and
performances that might be of interest to the mathematically minded.
Now with </i>Plus's</i> 
<A HREF="./reviews.html">all-time favourites</a>.
<LI><A HREF="./staff.html">Staff Room</A>
<LI><A HREF="./etc.html">Regulars</A>, including:
<UL>
<LI><A HREF="./etc.html#Puzzles">Puzzles</A>
<LI><A HREF="./etc.html#Mysteries">Mystery Mix</A>
<LI><A HREF="./etc.html#Editorials">Editorials</A>
<LI><A HREF="./etc.html#Outerspace">Outer space</A>
<LI><A HREF="./etc.html#Letters">Letters</A>
</UL>
</UL>
<p>

<a name="issue"><h2>Browse the back issues</h2></a>
If you know what issue you would like to read again, or just want to
read past issues of <i>Plus</i>, just pick your issue and hit go!
<p>
<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0">
<TR><TD ALIGN="LEFT">
<FORM METHOD="POST" ACTION="./backissue.cgi">
<SELECT name="cgi_BackIssue">

<OPTION VALUE="39" SELECTED>Issue 39: June 06</OPTION>
<OPTION VALUE="38">Issue 38: Mar 06</OPTION>
<OPTION VALUE="37">Issue 37: Dec 05</OPTION>
<OPTION VALUE="36">Issue 36: Sep 05</OPTION>
<OPTION VALUE="35">Issue 35: May 05</OPTION>
<OPTION VALUE="34">Issue 34: Mar 05</OPTION>
<OPTION VALUE="33">Issue 33: Jan 05</OPTION>
<OPTION VALUE="32">Issue 32: Nov 04</OPTION>
<OPTION VALUE="31">Issue 31: Sep 04</OPTION>
<OPTION VALUE="30">Issue 30: May 04</OPTION>
<OPTION VALUE="29">Issue 29: Mar 04</OPTION>
<OPTION VALUE="28">Issue 28: Jan 04</OPTION>
<OPTION VALUE="27">Issue 27: Nov 03</OPTION>
<OPTION VALUE="26">Issue 26: Sep 03</OPTION>
<OPTION VALUE="25">Issue 25: May 03</OPTION>
<OPTION VALUE="24">Issue 24: Mar 03</OPTION>
<OPTION VALUE="23">Issue 23: Jan 03</OPTION>
<OPTION VALUE="22">Issue 22: Nov 02</OPTION>
<OPTION VALUE="21">Issue 21: Sep 02</OPTION>
<OPTION VALUE="20">Issue 20: May 02</OPTION>
<OPTION VALUE="19">Issue 19: Mar 02</OPTION>
<OPTION VALUE="18">Issue 18: Jan 02</OPTION>
<OPTION VALUE="17">Issue 17: Nov 01</OPTION>
<OPTION VALUE="16">Issue 16: Sep 01</OPTION>
<OPTION VALUE="15">Issue 15: Jun 01</OPTION>
<OPTION VALUE="14">Issue 14: Mar 01</OPTION>
<OPTION VALUE="13">Issue 13: Jan 01</OPTION>
<OPTION VALUE="12">Issue 12: Sep 00</OPTION>
<OPTION VALUE="11">Issue 11: Jun 00</OPTION>
<OPTION VALUE="10">Issue 10: Jan 00</OPTION>
<OPTION VALUE="9">Issue 9: Sep 99</OPTION>
<OPTION VALUE="8">Issue 8: May 99</OPTION>
<OPTION VALUE="7">Issue 7: Jan 99</OPTION>
<OPTION VALUE="6">Issue 6: Sep 98</OPTION>
<OPTION VALUE="5">Issue 5: May 98</OPTION>
<OPTION VALUE="4">Issue 4: Jan 98</OPTION>
<OPTION VALUE="3">Issue 3: Sep 97</OPTION>
<OPTION VALUE="2">Issue 2: May 97</OPTION>
<OPTION VALUE="1">Issue 1: Jan 97</OPTION>
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</TD></TR></TABLE>
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<div class="centrehighlight">
<p>
You can browse the <i>Plus</i> archive in three ways: <p>
<ul>
<li><a href="#subject">Browse by subject;</a></li>
<li><a href="#type">Browse by article type;</a> or</li>
<li><a href="#issue">Browse by issue</a></li>
</ul>
<p>
And don't forget you can search the whole <i>Plus</i> website using
the Google search in the top right corner of every page.
<p>
<A NAME="subject"><h2>Browse by subject</h2></A>
We have indexed all our feature articles, career interviews, news
stories and mystery mixes by <a
href="./indices/topic_index.html">topic</a> and <a href="./indices/keyword_index.html">keyword</a>.
<p>

<a name="type"><h2>Articles by Type</h2></a>
<UL>

<LI><A HREF="./feature.html">Feature Articles</A>
-our feature articles describe applications of maths to real world problems
<LI><A HREF="./interview.html">Career Interviews</A>
- every issue we interview someone with a maths-related career,
showing the wide range of uses maths gets put to in the real world
<LI><A HREF="./news.html">News</A>
- we report on recent mathematical findings and explain the maths
underlying recent news stories in the general media
<LI><A HREF="./reviews.html">Reviews</A>
- reviews of books, CDROMs, and even plays, art exhibitions and
performances that might be of interest to the mathematically minded.
Now with </i>Plus's</i> 
<A HREF="./reviews.html">all-time favourites</a>.
<LI><A HREF="./staff.html">Staff Room</A>
<LI><A HREF="./etc.html">Regulars</A>, including:
<UL>
<LI><A HREF="./etc.html#Puzzles">Puzzles</A>
<LI><A HREF="./etc.html#Mysteries">Mystery Mix</A>
<LI><A HREF="./etc.html#Editorials">Editorials</A>
<LI><A HREF="./etc.html#Outerspace">Outer space</A>
<LI><A HREF="./etc.html#Letters">Letters</A>
</UL>
</UL>
<p>

<a name="issue"><h2>Browse the back issues</h2></a>
If you know what issue you would like to read again, or just want to
read past issues of <i>Plus</i>, just pick your issue and hit go!
<p>
<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0">
<TR><TD ALIGN="LEFT">
<FORM METHOD="POST" ACTION="./backissue.cgi">
<SELECT name="cgi_BackIssue">

<OPTION VALUE="39" SELECTED>Issue 39: June 06</OPTION>
<OPTION VALUE="38">Issue 38: Mar 06</OPTION>
<OPTION VALUE="37">Issue 37: Dec 05</OPTION>
<OPTION VALUE="36">Issue 36: Sep 05</OPTION>
<OPTION VALUE="35">Issue 35: May 05</OPTION>
<OPTION VALUE="34">Issue 34: Mar 05</OPTION>
<OPTION VALUE="33">Issue 33: Jan 05</OPTION>
<OPTION VALUE="32">Issue 32: Nov 04</OPTION>
<OPTION VALUE="31">Issue 31: Sep 04</OPTION>
<OPTION VALUE="30">Issue 30: May 04</OPTION>
<OPTION VALUE="29">Issue 29: Mar 04</OPTION>
<OPTION VALUE="28">Issue 28: Jan 04</OPTION>
<OPTION VALUE="27">Issue 27: Nov 03</OPTION>
<OPTION VALUE="26">Issue 26: Sep 03</OPTION>
<OPTION VALUE="25">Issue 25: May 03</OPTION>
<OPTION VALUE="24">Issue 24: Mar 03</OPTION>
<OPTION VALUE="23">Issue 23: Jan 03</OPTION>
<OPTION VALUE="22">Issue 22: Nov 02</OPTION>
<OPTION VALUE="21">Issue 21: Sep 02</OPTION>
<OPTION VALUE="20">Issue 20: May 02</OPTION>
<OPTION VALUE="19">Issue 19: Mar 02</OPTION>
<OPTION VALUE="18">Issue 18: Jan 02</OPTION>
<OPTION VALUE="17">Issue 17: Nov 01</OPTION>
<OPTION VALUE="16">Issue 16: Sep 01</OPTION>
<OPTION VALUE="15">Issue 15: Jun 01</OPTION>
<OPTION VALUE="14">Issue 14: Mar 01</OPTION>
<OPTION VALUE="13">Issue 13: Jan 01</OPTION>
<OPTION VALUE="12">Issue 12: Sep 00</OPTION>
<OPTION VALUE="11">Issue 11: Jun 00</OPTION>
<OPTION VALUE="10">Issue 10: Jan 00</OPTION>
<OPTION VALUE="9">Issue 9: Sep 99</OPTION>
<OPTION VALUE="8">Issue 8: May 99</OPTION>
<OPTION VALUE="7">Issue 7: Jan 99</OPTION>
<OPTION VALUE="6">Issue 6: Sep 98</OPTION>
<OPTION VALUE="5">Issue 5: May 98</OPTION>
<OPTION VALUE="4">Issue 4: Jan 98</OPTION>
<OPTION VALUE="3">Issue 3: Sep 97</OPTION>
<OPTION VALUE="2">Issue 2: May 97</OPTION>
<OPTION VALUE="1">Issue 1: Jan 97</OPTION>
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<div class="centrehighlight">
<p>
You can browse the <i>Plus</i> archive in three ways: <p>
<ul>
<li><a href="#subject">Browse by subject;</a></li>
<li><a href="#type">Browse by article type;</a> or</li>
<li><a href="#issue">Browse by issue</a></li>
</ul>
<p>
And don't forget you can search the whole <i>Plus</i> website using
the Google search in the top right corner of every page.
<p>
<A NAME="subject"><h2>Browse by subject</h2></A>
We have indexed all our feature articles, career interviews, news
stories and mystery mixes by <a
href="./indices/topic_index.html">topic</a> and <a href="./indices/keyword_index.html">keyword</a>.
<p>

<a name="type"><h2>Articles by Type</h2></a>
<UL>

<LI><A HREF="./feature.html">Feature Articles</A>
-our feature articles describe applications of maths to real world problems
<LI><A HREF="./interview.html">Career Interviews</A>
- every issue we interview someone with a maths-related career,
showing the wide range of uses maths gets put to in the real world
<LI><A HREF="./news.html">News</A>
- we report on recent mathematical findings and explain the maths
underlying recent news stories in the general media
<LI><A HREF="./reviews.html">Reviews</A>
- reviews of books, CDROMs, and even plays, art exhibitions and
performances that might be of interest to the mathematically minded.
Now with </i>Plus's</i> 
<A HREF="./reviews.html">all-time favourites</a>.
<LI><A HREF="./staff.html">Staff Room</A>
<LI><A HREF="./etc.html">Regulars</A>, including:
<UL>
<LI><A HREF="./etc.html#Puzzles">Puzzles</A>
<LI><A HREF="./etc.html#Mysteries">Mystery Mix</A>
<LI><A HREF="./etc.html#Editorials">Editorials</A>
<LI><A HREF="./etc.html#Outerspace">Outer space</A>
<LI><A HREF="./etc.html#Letters">Letters</A>
</UL>
</UL>
<p>

<a name="issue"><h2>Browse the back issues</h2></a>
If you know what issue you would like to read again, or just want to
read past issues of <i>Plus</i>, just pick your issue and hit go!
<p>
<TABLE CELLPADDING="0" CELLSPACING="0" BORDER="0">
<TR><TD ALIGN="LEFT">
<FORM METHOD="POST" ACTION="./backissue.cgi">
<SELECT name="cgi_BackIssue">

<OPTION VALUE="39" SELECTED>Issue 39: June 06</OPTION>
<OPTION VALUE="38">Issue 38: Mar 06</OPTION>
<OPTION VALUE="37">Issue 37: Dec 05</OPTION>
<OPTION VALUE="36">Issue 36: Sep 05</OPTION>
<OPTION VALUE="35">Issue 35: May 05</OPTION>
<OPTION VALUE="34">Issue 34: Mar 05</OPTION>
<OPTION VALUE="33">Issue 33: Jan 05</OPTION>
<OPTION VALUE="32">Issue 32: Nov 04</OPTION>
<OPTION VALUE="31">Issue 31: Sep 04</OPTION>
<OPTION VALUE="30">Issue 30: May 04</OPTION>
<OPTION VALUE="29">Issue 29: Mar 04</OPTION>
<OPTION VALUE="28">Issue 28: Jan 04</OPTION>
<OPTION VALUE="27">Issue 27: Nov 03</OPTION>
<OPTION VALUE="26">Issue 26: Sep 03</OPTION>
<OPTION VALUE="25">Issue 25: May 03</OPTION>
<OPTION VALUE="24">Issue 24: Mar 03</OPTION>
<OPTION VALUE="23">Issue 23: Jan 03</OPTION>
<OPTION VALUE="22">Issue 22: Nov 02</OPTION>
<OPTION VALUE="21">Issue 21: Sep 02</OPTION>
<OPTION VALUE="20">Issue 20: May 02</OPTION>
<OPTION VALUE="19">Issue 19: Mar 02</OPTION>
<OPTION VALUE="18">Issue 18: Jan 02</OPTION>
<OPTION VALUE="17">Issue 17: Nov 01</OPTION>
<OPTION VALUE="16">Issue 16: Sep 01</OPTION>
<OPTION VALUE="15">Issue 15: Jun 01</OPTION>
<OPTION VALUE="14">Issue 14: Mar 01</OPTION>
<OPTION VALUE="13">Issue 13: Jan 01</OPTION>
<OPTION VALUE="12">Issue 12: Sep 00</OPTION>
<OPTION VALUE="11">Issue 11: Jun 00</OPTION>
<OPTION VALUE="10">Issue 10: Jan 00</OPTION>
<OPTION VALUE="9">Issue 9: Sep 99</OPTION>
<OPTION VALUE="8">Issue 8: May 99</OPTION>
<OPTION VALUE="7">Issue 7: Jan 99</OPTION>
<OPTION VALUE="6">Issue 6: Sep 98</OPTION>
<OPTION VALUE="5">Issue 5: May 98</OPTION>
<OPTION VALUE="4">Issue 4: Jan 98</OPTION>
<OPTION VALUE="3">Issue 3: Sep 97</OPTION>
<OPTION VALUE="2">Issue 2: May 97</OPTION>
<OPTION VALUE="1">Issue 1: Jan 97</OPTION>
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