Prime ideals in birational extensions of polynomial rings

Author(s):  
William J. Heinzer ◽  
David Lantz ◽  
Sylvia M. Wiegand
2007 ◽  
Vol 35 (10) ◽  
pp. 3007-3012 ◽  
Author(s):  
Sei-Qwon Oh

1995 ◽  
Vol 175 (1) ◽  
pp. 188-198 ◽  
Author(s):  
C Shah

2014 ◽  
Vol 218 (2) ◽  
pp. 323-332 ◽  
Author(s):  
P.-H. Lee ◽  
E.R. Puczyłowski

2012 ◽  
Vol 12 (01) ◽  
pp. 1250137 ◽  
Author(s):  
JESSE ELLIOTT

Let D be an integral domain with quotient field K. For any set X, the ring Int (DX) of integer-valued polynomials onDX is the set of all polynomials f ∈ K[X] such that f(DX) ⊆ D. Using the t-closure operation on fractional ideals, we find for any set X a D-algebra presentation of Int (DX) by generators and relations for a large class of domains D, including any unique factorization domain D, and more generally any Krull domain D such that Int (D) has a regular basis, that is, a D-module basis consisting of exactly one polynomial of each degree. As a corollary we find for all such domains D an intrinsic characterization of the D-algebras that are isomorphic to a quotient of Int (DX) for some set X. We also generalize the well-known result that a Krull domain D has a regular basis if and only if the Pólya–Ostrowski group of D (that is, the subgroup of the class group of D generated by the images of the factorial ideals of D) is trivial, if and only if the product of the height one prime ideals of finite norm q is principal for every q.


2002 ◽  
Vol 45 (1) ◽  
pp. 91-115 ◽  
Author(s):  
Martin O’Neill

AbstractWe study a three parameter deformation $\mathcal{U}_{abc}$ of $\mathcal{U}(\mathfrak{sl}_2)$ introduced by Le Bruyn in 1995. Working over an arbitrary algebraically closed field of characteristic zero, we determine the centres, the finite-dimensional irreducible representations, and, when the parameter $a$ is not a non-trivial root of unity, the prime ideals of those $\mathcal{U}_{abc}$, with $ac\neq0$, which are conformal as ambiskew polynomial rings.AMS 2000 Mathematics subject classification: Primary 16W35; 17B37. Secondary 16S36; 16S80


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