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7.2.7.2 ring operations (plural)

+
construct a tensor product of two over the ground field. Let, e.g.,

be two -algebras, then is defined to be the algebra

Concerning the ground fields resp. of resp. , take the following guidelines for into consideration:

  • Neither nor may be or .
  • If the characteristic of and differs, then one of them must be .
  • At most one of and may have parameters.
  • If one of and is an algebraic extension of it may not be defined by a charstr of type (p^n,a).
One can create a ring using ring(list), see also ringlist.

Example:
 


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