
Baserings
 polynomial rings: K[x_{1},...,x_{n}]
 series rings,
i.e., localizations of a polynomial ring at a maximal ideal:
K[x_{1},...,x_{n}]_{M}
 factor rings by an ideal of one of the above:
K[x_{1},...,x_{n}]_{M} / J
 tensor products of one of the above
