<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0 plus SVG 1.1//EN" "http://www.w3.org/2002/04/xhtml-math-svg/xhtml-math-svg.dtd" [<!ENTITY mathml "http://www.w3.org/1998/Math/MathML">]>


<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">

<head>
  <base href="http://www.zentralblatt-math.org/zbmath/" />
  <meta http-equiv="content-type" content="application/xml; charset=utf-8" />
  <meta http-equiv="language" content="EN" />
  <title>Zentralblatt MATH - General Help</title>
  <meta name="description" content="" />
  <meta name="keywords" content="" />
  <meta name="classification" content="" />
  <meta name="rating" content="general" />
  <meta name="distribution" content="global" />
  <meta name="author" content="Zentralblatt MATH" />
  <meta name="copyright" content="Zentralblatt MATH" />
  <meta name="reply-to" content="editor@zentralblatt-math.org" />
  <meta name="robots" content="noindex,nofollow" />
  <meta name="revisit-after" content="7 days" />
  <script type="text/javascript" src="http://www.zentralblatt-math.org/zbmath/javascript/misc/jquery.js"></script>
  <script type="text/javascript" src="http://www.zentralblatt-math.org/zbmath/javascript/misc/ajax.js"></script>
  <script type="text/javascript" src="http://www.zentralblatt-math.org/zbmath/scripts.js"></script>
  <link rel="stylesheet" type="text/css" href="http://www.zentralblatt-math.org/zbmath/styles.css" />
  <link rel="stylesheet" type="text/css" href="http://www.zentralblatt-math.org/zbmath/layout.css" />
<!--[if IE]>
  <link rel="stylesheet" type="text/css" href="http://www.zentralblatt-math.org/zbmath/ie.css" />
<![endif]-->
  <link rel="icon" href="http://www.zentralblatt-math.org/zbmath/zbmath.ico" type="image/ico" />
</head>

<body>
    <div class="clear"></div>
<div id="page">
<div id="top">
  <div id="logo"><div class="alt"></div><a href="http://www.zentralblatt-math.org/zbmath/"><img src="http://www.zentralblatt-math.org/zbmath/images/logo.png" alt="" /></a></div>
  <div id="navigation">
  <a href="http://www.zentralblatt-math.org/zbmath/./" onmouseover="$('#navi1').attr('src','http://www.zentralblatt-math.org/zbmath/images/square_a.gif');" onmouseout="$('#navi1').attr('src','http://www.zentralblatt-math.org/zbmath/images/square.gif');"><img id="navi1" src="http://www.zentralblatt-math.org/zbmath/images/square.gif" alt="" />&nbsp;Home</a>
  <a href="http://www.zentralblatt-math.org/zbmath/classification/" onmouseover="$('#navi2').attr('src','http://www.zentralblatt-math.org/zbmath/images/square_a.gif');" onmouseout="$('#navi2').attr('src','http://www.zentralblatt-math.org/zbmath/images/square.gif');"><img id="navi2" src="http://www.zentralblatt-math.org/zbmath/images/square.gif" alt="" />&nbsp;Classification</a>
  <a href="http://www.zentralblatt-math.org/zbmath/authors/" onmouseover="$('#navi3').attr('src','http://www.zentralblatt-math.org/zbmath/images/square_a.gif');" onmouseout="$('#navi3').attr('src','http://www.zentralblatt-math.org/zbmath/images/square.gif');"><img id="navi3" src="http://www.zentralblatt-math.org/zbmath/images/square.gif" alt="" />&nbsp;Authors</a>
  <a href="http://www.zentralblatt-math.org/zbmath/journals/" onmouseover="$('#navi4').attr('src','http://www.zentralblatt-math.org/zbmath/images/square_a.gif');" onmouseout="$('#navi4').attr('src','http://www.zentralblatt-math.org/zbmath/images/square.gif');"><img id="navi4" src="http://www.zentralblatt-math.org/zbmath/images/square.gif" alt="" />&nbsp;Journals</a>
  <a href="http://www.zentralblatt-math.org/reviewer/en/" onmouseover="$('#navi5').attr('src','http://www.zentralblatt-math.org/zbmath/images/square_a.gif');" onmouseout="$('#navi5').attr('src','http://www.zentralblatt-math.org/zbmath/images/square.gif');"><img id="navi5" src="http://www.zentralblatt-math.org/zbmath/images/square.gif" alt="" />&nbsp;Reviewer-Service</a>
  <a href="http://www.zentralblatt-math.org/zbmath/subscription/" onmouseover="$('#navi6').attr('src','http://www.zentralblatt-math.org/zbmath/images/square_a.gif');" onmouseout="$('#navi6').attr('src','http://www.zentralblatt-math.org/zbmath/images/square.gif');"><img id="navi6" src="http://www.zentralblatt-math.org/zbmath/images/square.gif" alt="" />&nbsp;Subscription</a>
</div>
  <div id="claim">Search in about 3 million reviews from 150 years of mathematics</div>
  </div>
<div class="clear"></div>
<div id="line">
  <div id="path"><img src="http://www.zentralblatt-math.org/zbmath/images/path.gif" alt="" /><a href="http://www.zentralblatt-math.org/zbmath/">Home</a> | <a href="http://www.zentralblatt-math.org/zbmath/help/">General Help</a></div>
  <div id="contact"><a href="mailto:"><img src="http://www.zentralblatt-math.org/zbmath/images/email.gif" alt="" />Email</a>
<a href="javascript:window.print();" onclick="window.print();return false;"><img src="http://www.zentralblatt-math.org/zbmath/images/print.gif" alt="" />Print</a>
</div>
</div>
<div class="clear"></div>
<form class="form" action="http://www.zentralblatt-math.org/zbmath/search/" method="post">
<div id="query">
  <div id="form"><div id="form_any">
  <label class="form" for="any">Anywhere</label><br />
  <input class="text" type="text" id="any" name="any" value="" />
</div>
<div id="form_au">
  <label class="form" for="au">Author</label><br />
  <input class="text" type="text" id="au" name="au" value="" />
</div>
<div id="form_ti">
  <label class="form" for="ti">Title</label><br />
  <input class="text" type="text" id="ti" name="ti" value="" />
</div>
<div id="form_so">
  <label class="form" for="so">Source</label><br />
  <input class="text" type="text" id="so" name="so" value="" />
</div>
<div id="form_py">
  <label class="form" for="py">Year</label><br />
  <input class="text" type="text" id="py" name="py" value="" />
</div>
<div id="form_go">
  <label class="form"><a class="meta" href="" onclick="$('input[name=\'any\']')[0].value='';$('input[name=\'au\']')[0].value='';$('input[name=\'ti\']')[0].value='';$('input[name=\'so\']')[0].value='';$('input[name=\'py\']')[0].value='';;return false;">Clear</a>&nbsp;</label><br />
  <input class="submit" type="submit" name="go" value="  Go  " />
</div>
<div class="clear"></div>
</div>
  <div id="help"><a href="http://www.zentralblatt-math.org/zbmath/help/" onmouseover="$('#help_help').attr('src','http://www.zentralblatt-math.org/zbmath/images/arrow_a.gif');" onmouseout="$('#help_help').attr('src','http://www.zentralblatt-math.org/zbmath/images/arrow.gif');"><img id="help_help" src="http://www.zentralblatt-math.org/zbmath/images/arrow.gif" alt="" /> General Help</a><br />
  <a href="http://www.zentralblatt-math.org/zbmath/advanced/" onmouseover="$('#help_advanced').attr('src','http://www.zentralblatt-math.org/zbmath/images/arrow_a.gif');" onmouseout="$('#help_advanced').attr('src','http://www.zentralblatt-math.org/zbmath/images/arrow.gif');"><img id="help_advanced" src="http://www.zentralblatt-math.org/zbmath/images/arrow.gif" alt="" /> Advanced Search</a>
</div>
  <img id="image" src="http://www.zentralblatt-math.org/zbmath/images/box/right.gif" alt="" />
</div>
</form>
<div class="clear"></div>
<form class="form" action="http://www.zentralblatt-math.org/zbmath/help/" method="post">
<div id="main">
  <div id="content">      <h1>General Help</h1>
    <div class="clear"></div>
      <div class="text">
    <h2>Welcome to the Zentralblatt MATH Database</h2>    <p class="start">ZBMATH provides a comprehensive coverage of the international mathematical research published since 1868. It contains articles from about 3,500 journals and 1,100 serials, books of all publishers, available proceedings of conferences, and other research papers appearing in any language.</p><p>Currently, more than 6,000 scientists from all over the world are active in providing Zentralblatt with reviews. The reviews are written mainly in English, but reviews in French or German are also to be found.</p><p>Reviews undergo an editorial process and are finally produced getting an accession number of the form xxxx.xxxxx. Morover, preliminary information on not yet edited documents is provided. These documents have an 8-digit accession number and cover the most recently published literature.</p>
  <div class="clear paragraph "></div>
</div>
<div class="text">
    <h2>Topics</h2>    <p class="start"></p><ul><li><a href="help/search/">Help on query formulation</a></li><li><a href="help/mathml/">MathML</a></li></ul><p></p>
  <div class="clear paragraph "></div>
</div>
<div class="text">
    <h2>Help desk</h2>    <p class="start">If you need additional help on topics not covered here, you can correspond with any of the following addresses:</p><p>Editors of Zentralblatt für Mathematik<br />c/o Fachinformationszentrum Karlsruhe<br />Dept. of Mathematics and Computer Science (Berlin)<br />Franklinstraße 11<br />D-10589 Berlin<br />phone +49 30 392 7026<br />fax +49 30 392 7009<br />e-mail <a href="mailto:editor@zblmath.fiz-karlsruhe.de">editor@zblmath.fiz-karlsruhe.de</a></p><p>For author-identity related questions and hints: <br />e-mail <a href="mailto:authorid@zentralblatt-math.org">authorid@zentralblatt-math.org</a></p>
  <div class="clear paragraph "></div>
</div>

    <div class="clear"></div>
</div>
  <div id="menu"><ul><li><a href="http://www.zentralblatt-math.org/zbmath/" class="menu0" onmouseover="$('#menu000').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu_a.gif');" onmouseout="$('#menu000').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu.gif');"><img id="menu000" src="http://www.zentralblatt-math.org/zbmath/images/menu.gif" alt="" />Home</a></li><li><a href="http://www.zentralblatt-math.org/zbmath/search/" class="menu1" onmouseover="$('#menu101').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu_a.gif');" onmouseout="$('#menu101').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu.gif');"><img id="menu101" src="http://www.zentralblatt-math.org/zbmath/images/menu.gif" alt="" />Simple Search</a></li><li><a href="http://www.zentralblatt-math.org/zbmath/advanced/" class="menu1" onmouseover="$('#menu102').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu_a.gif');" onmouseout="$('#menu102').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu.gif');"><img id="menu102" src="http://www.zentralblatt-math.org/zbmath/images/menu.gif" alt="" />Advanced Search</a></li><li><a href="http://www.zentralblatt-math.org/zbmath/classification/" class="menu1" onmouseover="$('#menu103').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu_a.gif');" onmouseout="$('#menu103').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu.gif');"><img id="menu103" src="http://www.zentralblatt-math.org/zbmath/images/menu.gif" alt="" />Classification</a></li><li><a href="http://www.zentralblatt-math.org/zbmath/authors/" class="menu1" onmouseover="$('#menu104').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu_a.gif');" onmouseout="$('#menu104').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu.gif');"><img id="menu104" src="http://www.zentralblatt-math.org/zbmath/images/menu.gif" alt="" />Author Database</a></li><li><a href="http://www.zentralblatt-math.org/zbmath/journals/" class="menu1" onmouseover="$('#menu105').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu_a.gif');" onmouseout="$('#menu105').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu.gif');"><img id="menu105" src="http://www.zentralblatt-math.org/zbmath/images/menu.gif" alt="" />Journal Database</a></li><li><a href="http://www.zentralblatt-math.org/zbmath/help/" class="menu1 mark active"><img id="menu106" src="http://www.zentralblatt-math.org/zbmath/images/menu_a.gif" alt="" />General Help</a><ul><li><a href="http://www.zentralblatt-math.org/zbmath/help/search/" class="menu2" onmouseover="$('#menu201').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu_a.gif');" onmouseout="$('#menu201').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu.gif');"><img id="menu201" src="http://www.zentralblatt-math.org/zbmath/images/menu.gif" alt="" />Search</a></li><li><a href="http://www.zentralblatt-math.org/zbmath/help/mathml/" class="menu2" onmouseover="$('#menu202').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu_a.gif');" onmouseout="$('#menu202').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu.gif');"><img id="menu202" src="http://www.zentralblatt-math.org/zbmath/images/menu.gif" alt="" />MathML</a></li></ul></li><li><a href="http://www.zentralblatt-math.org/zbmath/subscription/" class="menu1" onmouseover="$('#menu107').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu_a.gif');" onmouseout="$('#menu107').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu.gif');"><img id="menu107" src="http://www.zentralblatt-math.org/zbmath/images/menu.gif" alt="" />Subscription</a></li><li><a href="http://www.zentralblatt-math.org/zbmath/contact/" class="menu1" onmouseover="$('#menu108').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu_a.gif');" onmouseout="$('#menu108').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu.gif');"><img id="menu108" src="http://www.zentralblatt-math.org/zbmath/images/menu.gif" alt="" />Contact</a></li><li><a href="http://www.zentralblatt-math.org/zbmath/about/" class="menu1" onmouseover="$('#menu109').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu_a.gif');" onmouseout="$('#menu109').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu.gif');"><img id="menu109" src="http://www.zentralblatt-math.org/zbmath/images/menu.gif" alt="" />About Zentralblatt</a></li><li><a href="http://www.zentralblatt-math.org/zbmath/copyright/" class="menu1" onmouseover="$('#menu110').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu_a.gif');" onmouseout="$('#menu110').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu.gif');"><img id="menu110" src="http://www.zentralblatt-math.org/zbmath/images/menu.gif" alt="" />Copyright</a></li><li><a href="http://www.zentralblatt-math.org/zbmath/imprint/" class="menu1" onmouseover="$('#menu111').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu_a.gif');" onmouseout="$('#menu111').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu.gif');"><img id="menu111" src="http://www.zentralblatt-math.org/zbmath/images/menu.gif" alt="" />Imprint</a></li><li><a href="http://www.zentralblatt-math.org/zbmath/sitemap/" class="menu1" onmouseover="$('#menu112').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu_a.gif');" onmouseout="$('#menu112').attr('src','http://www.zentralblatt-math.org/zbmath/images/menu.gif');"><img id="menu112" src="http://www.zentralblatt-math.org/zbmath/images/menu.gif" alt="" />Site Map</a></li></ul></div>
  <div id="editor"><div class="small">Copyright &copy; 2012:</div>
<a class="editor" href="http://www.fiz-karlsruhe.de" title=""><img src="http://www.zentralblatt-math.org/zbmath/images/logo/fiz.gif" alt="" /></a>
<a class="editor" href="http://www.euro-math-soc.eu" title=""><img src="http://www.zentralblatt-math.org/zbmath/images/logo/ems.gif" alt="" /></a>
<a class="editor" href="http://www.haw.baden-wuerttemberg.de" title=""><img src="http://www.zentralblatt-math.org/zbmath/images/logo/haw.gif" alt="" /></a>
<br />
<div class="small">Published by:</div>
<a class="editor" href="http://www.springer.de" title=""><img src="http://www.zentralblatt-math.org/zbmath/images/logo/springer.gif" alt="" /></a>
</div>
  <div id="margin">      <div id="logon">
  <div class="title">
    <img class="title" src="http://www.zentralblatt-math.org/zbmath/images/box/red.gif" alt="" />
    Login
  </div>
  <div class="content">
    <div class="username">
      <label class="form" for="username">Username</label><br />
      <input class="text" type="text" id="username" name="logon_.username:record" value="" />
    </div>
    <div class="password">
      <label class="form" for="password">Password</label><br />
      <input class="text" type="password" id="password" name="logon_.password:record" value="" />
    </div>
    <div class="clear"></div>
    <div class="submit">
      <input class="submit" type="submit" name="logon_.login:record" value="  Login  " />
    </div>
    <div class="link">
      <a href="mailto:editor@zentralblatt-math.org">forgotten password</a> 
    </div>
    <img class="left" src="http://www.zentralblatt-math.org/zbmath/images/box/left.gif" alt="" />
    <img class="right" src="http://www.zentralblatt-math.org/zbmath/images/box/right.gif" alt="" />
    <div class="clear"></div>
  </div>
</div>

    <div class="clear"></div>
      <div id="terms">
  <div class="title">
    Terms &amp; Conditions
    <img class="title" src="http://www.zentralblatt-math.org/zbmath/images/box/blue.gif" alt="" />
  </div>
  <div class="content">
              <p class="start">The Terms and Conditions for Web Databases of <a href="http://www.fiz-karlsruhe.de">FIZ Karlsruhe</a> apply to the  use of Zentralblatt MATH. </p><p>Link: <a href="http://www.fiz-karlsruhe.de/fileadmin/be_user/pdf/AGB/webdb_en.pdf">webdb_en.pdf</a></p><div class="clear paragraph "></div>
            <img class="left" src="http://www.zentralblatt-math.org/zbmath/images/box/left.gif" alt="" />
    <img class="right" src="http://www.zentralblatt-math.org/zbmath/images/box/right.gif" alt="" />
    <div class="clear"></div>
  </div>
</div>

    <div class="clear"></div>
</div>
</div>
</form>
<div class="clear"></div>
<div id="bottom">
  <div id="copyright">&copy; 2012 FIZ Karlsruhe GmbH</div>
  <div id="meta"><a href="http://www.zentralblatt-math.org/zbmath/contact/">Contact</a>
|
<a href="http://www.zentralblatt-math.org/zbmath/copyright/">Copyright</a>
|
<a href="http://www.zentralblatt-math.org/zbmath/imprint/">Legal Details</a>
|
<a href="http://www.zentralblatt-math.org/zbmath/sitemap/">Site Map</a>
|
<a href="mailto:webmaster@zentralblatt-math.org">Webmaster</a>
</div>
</div>
</div>

    
<div style="text-align:right;">
  <a href="http://validator.w3.org/check?uri=referer"><img style="border:0;width:88px;height:31px" src="xhtml_icon" alt="Valid XHTML 1.0 Transitional" /></a>
  <a href="http://jigsaw.w3.org/css-validator/validator?uri=http%3A%2F%2Fwww.zentralblatt-math.org/%2Fzbmath%2Flayout.css&amp;profile=css21&amp;usermedium=all&amp;warning=1"><img style="border:0;width:88px;height:31px" src="css_icon" alt="Valid CSS!" /></a>
</div>
</body>
</html>

