** -- a binary operator, usually used for tensor product or Cartesian product

Ways to use ** :

• AffineVariety ** Ring
• ChainComplex ** Module
• ChainComplex ** Ring
• ChainComplexMap ** Module
• GradedModule ** GradedModule
• GradedModule ** Module
• Matrix ** RingElement
• Module ** ChainComplex
• Module ** ChainComplexMap
• Module ** GradedModule
• Module ** Matrix
• ProjectiveVariety ** Ring
• RingElement ** Matrix
• RingElement ** RingElement
• RingElement ** ZZ
• BettiTally ** BettiTally, see BettiTally -- the class of all Betti tallies
• ChainComplex ** ChainComplex -- tensor product
• ChainComplex ** ChainComplexMap -- tensor product
• ChainComplex ** GradedModule -- tensor product
• ChainComplexMap ** ChainComplex -- tensor product
• ChainComplexMap ** ChainComplexMap -- tensor product
• CoherentSheaf ** CoherentSheaf -- tensor product of coherent sheaves
• Expression ** Expression, see Expression -- the class of all expressions
• GradedModule ** ChainComplex -- tensor product
• Matrix ** Matrix -- tensor product of matrices
• Matrix ** Module -- tensor product
• Matrix ** Ring -- tensor product
• Module ** Module -- tensor product of modules
• Module ** Ring -- tensor product
• Monoid ** Monoid -- tensor product of monoids
• Ring ** Matrix -- missing documentation
• Ring ** Module -- missing documentation
• Ring ** Ring -- tensor product
• RingMap ** Matrix -- missing documentation
• RingMap ** Module -- tensor product of a module via a ring map
• Set ** Set -- Cartesian product
• Tally ** Tally -- Cartesian product of tallies
• Vector ** Vector -- missing documentation

For the programmer

The object ** is a keyword.

         X ** Y := (x,y) -> ...