<?xml version="1.0" encoding="utf-8" ?> <!-- for emacs: -*- coding: utf-8 -*- --> <!-- Apache may like this line in the file .htaccess: AddCharset utf-8 .html --> <!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-flat.dtd" > <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en"> <head><title>** -- a binary operator, usually used for tensor product or Cartesian product</title> <link rel="stylesheet" type="text/css" href="../../../../Macaulay2/Style/doc.css"/> </head> <body> <table class="buttons"> <tr> <td><div><a href="_^_st_st.html">next</a> | <a href="__pl_pl.html">previous</a> | <a href="_^_st_st.html">forward</a> | <a href="__pl_pl.html">backward</a> | <a href="_operators.html">up</a> | <a href="index.html">top</a> | <a href="master.html">index</a> | <a href="toc.html">toc</a> | <a href="http://www.math.uiuc.edu/Macaulay2/">Macaulay2 web site</a></div> </td> </tr> </table> <div><a href="index.html" title="">Macaulay2Doc</a> > <a href="___The_sp__Macaulay2_splanguage.html" title="">The Macaulay2 language</a> > <a href="_operators.html" title="">operators</a> > <a href="__st_st.html" title="a binary operator, usually used for tensor product or Cartesian product">**</a></div> <hr/> <div><h1>** -- a binary operator, usually used for tensor product or Cartesian product</h1> <div><!--empty documentation body--></div> <div class="single"><h2>See also</h2> <ul><li><span><a href="_^_st_st.html" title="a binary operator, usually used for tensor or Cartesian power">^**</a> -- a binary operator, usually used for tensor or Cartesian power</span></li> </ul> </div> <div class="waystouse"><h2>Ways to use <tt>**</tt> :</h2> <ul><li><span><a href="___Affine__Variety_sp_st_st_sp__Ring.html" title="a binary operator, usually used for tensor product or Cartesian product">AffineVariety ** Ring</a> -- a binary operator, usually used for tensor product or Cartesian product</span></li> <li><span>BettiTally ** BettiTally, see <span><a href="___Betti__Tally.html" title="the class of all Betti tallies">BettiTally</a> -- the class of all Betti tallies</span></span></li> <li><span><a href="___Chain__Complex_sp_st_st_sp__Chain__Complex.html" title="tensor product">ChainComplex ** ChainComplex</a> -- tensor product</span></li> <li><span>ChainComplex ** Module, see <span><a href="___Chain__Complex_sp_st_st_sp__Chain__Complex.html" title="tensor product">ChainComplex ** ChainComplex</a> -- tensor product</span></span></li> <li><span>Module ** ChainComplex, see <span><a href="___Chain__Complex_sp_st_st_sp__Chain__Complex.html" title="tensor product">ChainComplex ** ChainComplex</a> -- tensor product</span></span></li> <li><span><a href="___Chain__Complex_sp_st_st_sp__Chain__Complex__Map.html" title="tensor product">ChainComplex ** ChainComplexMap</a> -- tensor product</span></li> <li><span>Module ** ChainComplexMap, see <span><a href="___Chain__Complex_sp_st_st_sp__Chain__Complex__Map.html" title="tensor product">ChainComplex ** ChainComplexMap</a> -- tensor product</span></span></li> <li><span><a href="___Chain__Complex_sp_st_st_sp__Graded__Module.html" title="tensor product">ChainComplex ** GradedModule</a> -- tensor product</span></li> <li><span><a href="___Chain__Complex_sp_st_st_sp__Ring.html" title="a binary operator, usually used for tensor product or Cartesian product">ChainComplex ** Ring</a> -- a binary operator, usually used for tensor product or Cartesian product</span></li> <li><span><a href="___Chain__Complex__Map_sp_st_st_sp__Chain__Complex.html" title="tensor product">ChainComplexMap ** ChainComplex</a> -- tensor product</span></li> <li><span>ChainComplexMap ** Module, see <span><a href="___Chain__Complex__Map_sp_st_st_sp__Chain__Complex.html" title="tensor product">ChainComplexMap ** ChainComplex</a> -- tensor product</span></span></li> <li><span><a href="___Chain__Complex__Map_sp_st_st_sp__Chain__Complex__Map.html" title="tensor product">ChainComplexMap ** ChainComplexMap</a> -- tensor product</span></li> <li><span><a href="___Coherent__Sheaf_sp_st_st_sp__Coherent__Sheaf.html" title="tensor produce of coherent sheaves">CoherentSheaf ** CoherentSheaf</a> -- tensor produce of coherent sheaves</span></li> <li><span>Expression ** Expression, see <span><a href="___Expression.html" title="the class of all expressions">Expression</a> -- the class of all expressions</span></span></li> <li><span><a href="___Graded__Module_sp_st_st_sp__Chain__Complex.html" title="tensor product">GradedModule ** ChainComplex</a> -- tensor product</span></li> <li><span><a href="___Graded__Module_sp_st_st_sp__Graded__Module.html" title="a binary operator, usually used for tensor product or Cartesian product">GradedModule ** GradedModule</a> -- a binary operator, usually used for tensor product or Cartesian product</span></li> <li><span><a href="___Graded__Module_sp_st_st_sp__Module.html" title="a binary operator, usually used for tensor product or Cartesian product">GradedModule ** Module</a> -- a binary operator, usually used for tensor product or Cartesian product</span></li> <li><span>Module ** GradedModule, see <span><a href="___Graded__Module_sp_st_st_sp__Module.html" title="a binary operator, usually used for tensor product or Cartesian product">GradedModule ** Module</a> -- a binary operator, usually used for tensor product or Cartesian product</span></span></li> <li><span><a href="___Matrix_sp_st_st_sp__Matrix.html" title="tensor product">Matrix ** Matrix</a> -- tensor product</span></li> <li><span><a href="___Matrix_sp_st_st_sp__Module.html" title="tensor product">Matrix ** Module</a> -- tensor product</span></li> <li><span>Module ** Matrix, see <span><a href="___Matrix_sp_st_st_sp__Module.html" title="tensor product">Matrix ** Module</a> -- tensor product</span></span></li> <li><span><a href="___Matrix_sp_st_st_sp__Ring.html" title="tensor product">Matrix ** Ring</a> -- tensor product</span></li> <li><span>Ring ** Matrix, see <span><a href="___Matrix_sp_st_st_sp__Ring.html" title="tensor product">Matrix ** Ring</a> -- tensor product</span></span></li> <li><span><a href="___Matrix_sp_st_st_sp__Ring__Element.html" title="a binary operator, usually used for tensor product or Cartesian product">Matrix ** RingElement</a> -- a binary operator, usually used for tensor product or Cartesian product</span></li> <li><span><a href="___Module_sp_st_st_sp__Module.html" title="tensor product">Module ** Module</a> -- tensor product</span></li> <li><span><a href="___Module_sp_st_st_sp__Ring.html" title="tensor product">Module ** Ring</a> -- tensor product</span></li> <li><span>Ring ** Module, see <span><a href="___Module_sp_st_st_sp__Ring.html" title="tensor product">Module ** Ring</a> -- tensor product</span></span></li> <li><span><a href="___Monoid_sp_st_st_sp__Monoid.html" title="tensor product of monoids">Monoid ** Monoid</a> -- tensor product of monoids</span></li> <li><span><a href="___Ring_sp_st_st_sp__Ring.html" title="tensor product">Ring ** Ring</a> -- tensor product</span></li> <li><span><a href="___Ring__Map_sp_st_st_sp__Matrix.html" title="tensor product of a module map via a ring map">RingMap ** Matrix</a> -- tensor product of a module map via a ring map</span></li> <li><span><a href="___Ring__Map_sp_st_st_sp__Module.html" title="tensor product of a module via a ring map">RingMap ** Module</a> -- tensor product of a module via a ring map</span></li> <li><span><a href="___Set_sp_st_st_sp__Set.html" title="Cartesian product">Set ** Set</a> -- Cartesian product</span></li> <li><span><a href="___Tally_sp_st_st_sp__Tally.html" title="Cartesian product of tallies">Tally ** Tally</a> -- Cartesian product of tallies</span></li> <li><span><a href="___Vector_sp_st_st_sp__Vector.html" title="tensor product">Vector ** Vector</a> -- tensor product</span></li> </ul> </div> <div class="waystouse"><h2>For the programmer</h2> <p>The object <a href="__st_st.html" title="a binary operator, usually used for tensor product or Cartesian product">**</a> is <span>a <a href="___Keyword.html">keyword</a></span>.</p> <div><div><p>This operator may be used as a binary operator in an expression like <tt>x**y</tt>. The user may install <a href="_binary_spmethods.html" title="">binary methods</a> for handling such expressions with code such as</p> <pre> X ** Y := (x,y) -> ...</pre> <p>where <tt>X</tt> is the class of <tt>x</tt> and <tt>Y</tt> is the class of <tt>y</tt>.</p> </div> </div> </div> </div> </body> </html>