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We prove that the nilpotent commuting variety of a reductive Lie algebra over an algebraically closed field of good characteristic is equidimensional. In characteristic zero, this confirms a conjecture of Vladimir Baranovsky. As a…

Representation Theory · Mathematics 2015-06-26 Alexander Premet

In [4] Sturmfels linked the Hilbert Nullstellensatz to Gr\"obner bases through final polynomials. In (loc. cit.) it was claimed that final polynomials always appear in a lexicographic Gr\"obner basis of a certain ideal. In this paper, we…

Commutative Algebra · Mathematics 2024-05-28 Peter Lundgaard , Andreas Bøgh Poulsen

We present a uniform framework for establishing Nullstellens\"atze for power series rings using quantifier elimination results for valued fields. As an application we obtain Nullstellens\"atze for $p$-adic power series (both formal and…

Logic · Mathematics 2024-03-11 Matthias Aschenbrenner , Ahmed Srhir

This article concerns commutative algebras over a field $k$ of characteristic zero which are finite dimensional as vectorspaces, and particularly those of such algebras which are graded. Here the term graded is applied to non-negatively…

Algebraic Geometry · Mathematics 2011-08-29 Guillermo Cortiñas , Fabiana Krongold

The notion of regular pair $(A,B)$ for two nonempty closed convex subsets $A$ and~$B$ of a Hilbert space $\H$ was introduced by Borwein and Bauschke in 1993 to ensure convergence (in norm) of the alternating projection method to some point…

Optimization and Control · Mathematics 2026-05-05 Francesco Battistoni , Aris Daniilidis , Carlo Alberto De Bernardi , Enrico Miglierina

We prove a Nullstellensatz result for global ideals of Denjoy-Carleman functions in both finitely generated and infinitely generated cases.

Algebraic Geometry · Mathematics 2023-11-14 Francesca Acquistapace , Fabrizio Broglia , Andreea Nicoara

A classical theory of Desarguesian geometry, originating with D. Hilbert in his 1899 treatise, Grundlagen der Geometrie, leads from axioms to the construction of a division ring from which coordinates may be assigned to points, and…

Metric Geometry · Mathematics 2024-02-13 Mark Mandelkern

We present a new effective Nullstellensatz with bounds for the degrees which depend not only on the number of variables and on the degrees of the input polynomials but also on an additional parameter called the {\it geometric degree of the…

alg-geom · Mathematics 2008-02-03 Martin Sombra

We prove the extended Hilbert's Nullstellensatz in the context of Hu-Liu polynomial trirings.

Algebraic Geometry · Mathematics 2007-05-23 Keqin Liu

Systems of polynomial equations over an algebraically-closed field K can be used to concisely model many combinatorial problems. In this way, a combinatorial problem is feasible (e.g., a graph is 3-colorable, hamiltonian, etc.) if and only…

Combinatorics · Mathematics 2008-01-25 J. A. De Loera , J. Lee , P. Malkin , S. Margulies

We consider the minimal free resolution of a generic set of n+1 forms (not necessarily of the same degree) in a polynomial ring of n variables. The Hilbert function for such an ideal is known, thanks to a result of Stanley and of Watanabe.…

Commutative Algebra · Mathematics 2007-05-23 Juan C. Migliore , Rosa Miró-Roig

In this expository note we show how combinatorial Nullstellensatz by N. Alon naturally appears in solutions of elementary problems. Simple ideas gradually and naturally appear in such solutions, thus bringing a reader to generalizations.…

History and Overview · Mathematics 2026-01-08 M. Lozhkin , A. Skopenkov

We introduce the concept of centrally algebraically closed division rings and show that a division ring satisfies the central Nullstellensatz if and only if it is centrally algebraically closed. We also show that every division ring can be…

Rings and Algebras · Mathematics 2025-11-04 Masood Aryapoor

In this paper, a new notion of frames is introduced: $\ast$-operator frame as generalization of $\ast$-frames in Hilbert $C^{\ast}$-modules introduced by A. Alijani and M. A. Dehghan \cite{Ali} and we establish some results.

Operator Algebras · Mathematics 2018-11-13 Mohamed Rossafi , Samir Kabbaj

We present bounds for the degree and the height of the polynomials arising in some central problems in effective algebraic geometry including the implicitation of rational maps and the effective Nullstellensatz over a variety. Our treatment…

Algebraic Geometry · Mathematics 2012-10-23 Carlos D'Andrea , Teresa Krick , Martin Sombra

In this paper we introduce a new algebraic method in tilings. Combining this method with Hilbert's Nullstellensatz we obtain a necessary condition for tiling $n$-space by translates of a cluster of cubes. Further, the polynomial method will…

Combinatorics · Mathematics 2016-03-02 Peter Horak , Dongryul Kim

In 1975, Goldfeld gave an effective solution to Gauss's conjecture on the class numbers of imaginary quadratic fields. In this paper, we generalize Goldfeld's theorem to the setting of totally real number fields.

Number Theory · Mathematics 2024-02-01 Qinyun Tan , Bingyong Xie

We revisit tensor algebras of subproduct systems with Hilbert space fibers, resolving some open questions in the case of infinite dimensional fibers. We characterize when a tensor algebra can be identified as the algebra of uniformly…

Operator Algebras · Mathematics 2025-04-16 Michael Hartz , Orr Shalit

In this paper we give a new proof for the completeness of infinite valued propositional \L ukasiewicz logic introduced by \L ukasiewicz and Tarski in 1930. Our approach employs a Hilbert-style proof that relies on the concept of maximal…

Logic · Mathematics 2023-08-29 Doratossadat Dastgheib , Hadi Farahani

Let $T$ be a complete theory of fields, possibly with extra structure. Suppose that model-theoretic algebraic closure agrees with field-theoretic algebraic closure, or more generally that model-theoretic algebraic closure has the exchange…

Logic · Mathematics 2023-06-28 Will Johnson , Jinhe Ye