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We establish primitive recursive versions of some known facts about computable ordered fields of reals and computable reals, and then apply them to proving primitive recursiveness of some natural problems in linear algebra and analysis. In…

Computational Complexity · Computer Science 2021-11-09 Victor Selivanov , Svetlana Selivanova

We construct a non-separable C*-algebra that is prime but not primitive.

Operator Algebras · Mathematics 2007-05-23 Nik Weaver

We consider an analogue of Artin's primitive root conjecture for units in real quadratic fields. Given such a nontrivial unit, for a rational prime p which is inert in the field the maximal order of the unit modulo p is p+1. An extension of…

Number Theory · Mathematics 2007-05-23 Joseph Cohen

We consider amalgamated unital full free products of the form $A_1*_DA_2$, where $A_1, A_2$ and $D$ are finite dimensional C*-algebras and there are faithful traces on $A_1$ and $A_2$ whose restrictions to $D$ agree. We provide several…

Operator Algebras · Mathematics 2014-01-09 Francisco Torres-Ayala

We classify the primitive ideals of generalized down-up algebras

Rings and Algebras · Mathematics 2010-03-12 Iwan Praton

We generalize Jacobson's notion of primitive ring to the setting of quantales. We show that every primitive ring gives rise to a primitive quantale of ideals. We then prove a density theorem for strongly primitive quantales. Furthermore, we…

Rings and Algebras · Mathematics 2025-06-11 Amartya Goswami , Elena Caviglia , Luca Mesiti

We establish necessary and sufficient conditions on a (not necessarily countable) graph E for the graph C*-algebra C*(E) to be primitive. Along with a known characterization of the graphs E for which C*(E) is prime, our main result provides…

Operator Algebras · Mathematics 2013-08-26 Gene Abrams , Mark Tomforde

Using the properties of the ideal of the coordinate Hermite interpolation on n-dimensional grid [4], we prove that the extension k in k[x1, x2, ..., xn] / (f1(x1), ..., fn(xn)) has a primitive element if and only if at most one of the…

Algebraic Geometry · Mathematics 2024-05-01 Aristides I. Kechriniotis

Let G be a finite group, let p be a prime number, and let K be a field of characteristic 0 and k be a field of characteristic p, both large enough. In this note we state explicit formulae for the primitive idempotents of K\otimes pp_k(G),…

Group Theory · Mathematics 2009-11-09 Serge Bouc , Jacques Thévenaz

Using Popa's deformation/rigidity theory, we investigate prime decompositions of von Neumann algebras of the form $L(\mathcal{R})$ for countable probability measure preserving equivalence relations $\mathcal{R}$. We show that…

Operator Algebras · Mathematics 2015-10-30 Daniel J. Hoff

Let K be a number field, let f(x) in K(x) be a rational function of degree d> 1, and let z in K be a wandering point such that f^n(z) is nonzero for all n > 0. We prove that if the abc-conjecture holds for K, then for all but finitely many…

Number Theory · Mathematics 2014-02-26 Chad Gratton , Khoa Nguyen , Thomas J. Tucker

We study primitive elements in the Ringel-Hall algebra H(A) of an algebra A over a finite field associated with a quiver with automorphism. When A is a tame hereditary algebra, we give a description of primitive elements in H(A) which…

Representation Theory · Mathematics 2026-03-10 Bangming Deng , Weihao Li

We investigate a class of algebras that provides multiparameter versions of both quantum symplectic space and quantum Euclidean $2n$-space. These algebras encompass the graded quantized Weyl algebras, the quantized Heisenberg space, and a…

Quantum Algebra · Mathematics 2007-05-23 K. L. Horton

Let $K$ be a number field and let $G$ be a finitely generated subgroup of $K^\times$. For all but finitely many primes $\mathfrak p$ of $K$, the reduction $(G \bmod \mathfrak p)$ generates a well-defined subgroup of the multiplicative group…

Number Theory · Mathematics 2025-08-13 Pietro Sgobba

We give a complete description of the primitive ideal space of the C*-algebra associated to the ring of integers R in a number field K as considered in a recent paper by Cuntz, Deninger and Laca.

Operator Algebras · Mathematics 2015-06-03 Siegfried Echterhoff , Marcelo Laca

In this paper we will study integrability of distributions whose primitives are left regulated functions and locally or globally integrable in the Henstock--Kurzweil, Lebesgue or Riemann sense. Corresponding spaces of distributions and…

Classical Analysis and ODEs · Mathematics 2013-01-04 Seppo Heikkilä , Erik Talvila

Let $K$ be a number field, and let $G$ be a finitely generated subgroup of $K^\times$. Without relying on the Generalized Riemann Hypothesis we prove an asymptotic formula for the number of primes $\mathfrak p$ of $K$ such that the order of…

Number Theory · Mathematics 2023-03-24 Pietro Sgobba

We extend two well-known results on primitive ideals in enveloping algebras of semisimple Lie algebras, the `Irreducibility theorem' and `Duflo theorem', to much wider classes of algebras. Our general version of Irreducibility theorem says…

Representation Theory · Mathematics 2012-05-29 Victor Ginzburg

We describe the prime and primitive spectra for quantized enveloping algebras at roots of 1 in characteristic zero in terms of the prime spectrum of the underlying enveloping algebra. For primitive ideals we obtain an analogue of Duflo's…

Quantum Algebra · Mathematics 2007-05-23 William Chin , Leonid Krop

We give a complete characterization of countable primitive groups in several settings including linear groups, subgroups of mapping class groups, groups acting minimally on trees and convergence groups. The latter category includes as a…

Group Theory · Mathematics 2007-05-23 Tsachik Gelander , Yair Glasner