WebHilbert's fourteenth problem--the finite generation of subrings such as rings of invariants In book: Mathematical developments arising from Hilbert problems (Proc. Sympos. Pure … In mathematics, Hilbert's fourteenth problem, that is, number 14 of Hilbert's problems proposed in 1900, asks whether certain algebras are finitely generated. The setting is as follows: Assume that k is a field and let K be a subfield of the field of rational functions in n variables, k(x1, ..., xn ) over k.Consider … See more The problem originally arose in algebraic invariant theory. Here the ring R is given as a (suitably defined) ring of polynomial invariants of a linear algebraic group over a field k acting algebraically on a polynomial ring k[x1, … See more • Locally nilpotent derivation See more Zariski's formulation of Hilbert's fourteenth problem asks whether, for a quasi-affine algebraic variety X over a field k, possibly assuming X normal or smooth, the ring of regular functions on … See more Nagata (1958) harvtxt error: no target: CITEREFNagata1958 (help) gave the following counterexample to Hilbert's problem. The field k … See more
Counterexamples to Hilbert’s Fourteenth Problem
WebMar 18, 2024 · Hilbert's fourth problem. The problem of the straight line as the shortest distance between two points. This problem asks for the construction of all metrics in … WebOct 21, 2024 · Hilbert’s fourth problem is about what happens when you relax the rules of Euclidean geometry. Specifically, what geometries can exist in which a straight line is the shortest distance between... ipx9k headphones
Mathematical Developments Arising from Hilbert Problems
WebMay 16, 2005 · [Submitted on 16 May 2005 ( v1 ), last revised 1 May 2007 (this version, v2)] Hilbert's 14th Problem and Cox Rings Ana-Maria Castravet, Jenia Tevelev Our main result is the description of generators of the total coordinate ring of the blow-up of in any number of points that lie on a rational normal curve. Webthen we see that this is a special case of Hilbert’s 14th problem. In general we can start with an arbitrary nitely generated ring R (that is, a quotient of the polynomial ring C[x 1;x 2;:::;x n]) and a linear algebraic group Gacting on Rand consider the ring of invariants RG. It is then natural to ask if RG is nitely generated. WebAug 5, 2008 · Hilbert's fourteenth problem over finite fields, and a conjecture on the cone of curves. We give examples over arbitrary fields of rings of invariants that are not finitely generated. The group involved can be as small as three copies of the additive group, as in Mukai's examples over the complex numbers. The failure of finite generation comes ... ipx9 waterproof bluetooth headphones