Integer-valued polynomials on the ring of integers have been known for a long time and have been used in calculus. Pólya and Ostrowski generalized this notion to rings of integers of number fields. More generally still, one may consider a domain $D$ and the polynomials (with coefficients in its quotient field) mapping $D$ into itself. They form a $D$-algebra—that is, a $D$-module with a ring structure. Appearing in a very natural fashion, this ring possesses quite a rich structure, and the very numerous questions it raises allow a thorough exploration of commutative algebra. Here is the first book devoted entirely to this topic.

Features:

• Thorough reviews of many published works.
• Self-contained text with complete proofs.
• Numerous exercises.

Readership

Graduate students and research mathematicians interested in commutative algebra and algebraic number theory.