Results 31 to 40 of about 14,293,729 (308)
Definability of linear equation systems over groups and rings [PDF]
, 2012 Motivated by the quest for a logic for PTIME and recent insights that the descriptive complexity of problems from linear algebra is a crucial aspect of this problem, we study the solvability of linear equation systems over finite groups and rings from ...
Anuj Dawar +5 more
core +6 more sources
On Generalized m-flat Modules [PDF]
Al-Rafidain Journal of Computer Sciences and Mathematics, 2013 Let I be a right (left) ideal of a ring R. Then R/I is a right (left) generalized m – flat modules (GmF – module) if and only if for each , there exist and a fixed positive integer m such that .
Zubayda Ibraheem, Maha Khalaf
doaj +1 more source
Commutative Boolean monoids, reduced rings, and the compressed zero-divisor graph
, 2012 Let R be a commutative ring with 1≠0. The zero-divisor graph Γ(R) of R is the (undirected) graph whose vertices consist of the nonzero zero-divisors of R such that distinct vertices x and y are adjacent if and only if xy=0. The relation on R given by r∼s
David F. Anderson, John D. LaGrange
semanticscholar +1 more source
Reduction of diphenylacetylene using Al powder in the presence of noble metal catalysts in water [PDF]
, 2016 Diphenylacetylenes can be reduced to the corresponding diphenylethanes (2) in water in excellent yield using Al powder and Pd/C at 60 °C for 3 h in a sealed tube.
Kowser, Zannatul +3 more
core +1 more source
Design and construction of a shield for the 9" x 9" NaI(Tl) well-type detector [PDF]
Nuclear Technology and Radiation Protection, 2014 This paper describes a homemade lead, 15 cm-thick, cylindrical shaped shield of a 9" x 9" NaI(Tl) gamma spectrometric well-type detector. Commercially available lead was melted into cylindrical rings.
Hansman Jan
doaj +1 more source
Vertex rings and their Pierce bundles
, 2017 In part I we introduce vertex rings, which bear the same relation to vertex algebras (or VOAs) as commutative, associative rings do to commutative, associative algebras over the complex numbers.
Mason, Geoffrey
core +1 more source
Relative Stability and Local Curvature Analysis in Carbon Nanotori [PDF]
, 2015 We introduce a concise formalism to characterize nanometer-sized tori based on carbon nanotubes and to determine their stability by combining {\em ab initio} density functional calculations with a continuum elasticity theory approach that requires only ...
Chuang, Chern +5 more
core +2 more sources
Fluctuation persistent current in small superconducting rings
, 2010 We extend previous theoretical studies of the contribution of fluctuating Cooper pairs to the persistent current in superconducting rings subjected to a magnetic field. For sufficiently small rings, in which the coherence length $\xi$ exceeds the radius $
Oreg, Yuval, Schwiete, Georg
core +1 more source
Doubly Spinning Black Rings [PDF]
, 2006 We study a method to solve stationary axisymmetric vacuum Einstein equations numerically. As an illustration, the five-dimensional doubly spinning black rings that have two independent angular momenta are formulated in a way suitable for fully nonlinear ...
Hideaki Kudoh, W. Press
core +3 more sources
Completely reducible near-rings [PDF]
Proceedings of the Edinburgh Mathematical Society, 1977 To establish our notation N will always denote a (left) near-ring without any type of multiplicative identity (unless the contrary is stated) satisfying On = 0 for each n ∈ N where 0 is the additive identity of N. A group M, written additively, which admits N as a set of right multipliers is a (right) N-module if a ∈ M, n1, n2 ∈ N implies a(n1 + n2 ...
openaire +2 more sources