public HSExplicitMultitermOperation(
     IEnumerable <TTerms> terms,
     MultitermOpFunction <IHSExplicitVector <TBasis>, TTerms> opFunction,
     string opName,
     string opSymbol)
     : base(terms, opFunction, opName, opSymbol)
 {
 }
 public AlgebraicMultitermOperation(
     IEnumerable <TTerms> terms,
     MultitermOpFunction <IAlgebraicExpression, TTerms> opFunction,
     string opName,
     string opSymbol)
     : base(terms, opFunction, opName, opSymbol)
 {
 }