Results 41 to 50 of about 1,563,307 (153)
The almost isomorphism relation for simple regular rings [PDF]
, 1992 A longstanding open problem in the theory of von Neumann regular rings is the question of whether every directly finite simple regular ring must be unit-regular. Recent work on this problem has been done by P. Menal, K.C . O'Meara, and the authors.
Ara, Pere,, Goodearl, K. R.
core +2 more sources
Plasmon-induced transparency in ring-bar meta-atom
AIP Advances, 2018 We introduce an approach for constructing a scalable metamaterial structure, which is composed of a ring and a bar in a unit cell, and supports singular plasmon-induced transparency. The composite multilayered structure consists of coupled meta-atom with
Wan-Xia Huang +5 more
doaj +1 more source
Coupled cell networks: Boolean perspective
Biomath, 2017 During the 1980s and early 1990s, Martin Golubitsky and Ian Stewart formulated and developed a theory of "coupled cell networks" (CCNs). Their research was primarily focused onquadrupeds' gaits and they applied the framework of differential equations ...
Katarzyna Swirydowicz
doaj +1 more source
Research, 2022 The manipulation on turn-on fluorescence in solid state materials attracts increasing interests owing to their widespread applications. Herein we report how the nonradiative pathways of tetraphenylpyrazine (TPP) units in metal−organic frameworks (MOFs ...
He-Qi Zheng +6 more
doaj +1 more source
A Groupoid Approach to Discrete Inverse Semigroup Algebras [PDF]
, 2009 Let $K$ be a commutative ring with unit and $S$ an inverse semigroup. We show that the semigroup algebra $KS$ can be described as a convolution algebra of functions on the universal \'etale groupoid associated to $S$ by Paterson.
Steinberg, Benjamin
core +3 more sources
Acta Crystallographica Section E: Crystallographic Communications, 2023 The title compound, C32H28F2N2O2, a highly functionalized tetrahydropyridine, was synthesized by a one-pot multi-component reaction of 4-fluoroaniline, ethyl acetoacetate and benzaldehyde at room temperature using sodium lauryl sulfate as a catalyst. The
Ravi Bansal +2 more
doaj +1 more source
Semilattices of finitely generated ideals of exchange rings with finite stable rank
, 2004 We find a distributive (v, 0, 1)-semilattice S of size $ aleph\_1$ that is not isomorphic to the maximal semilattice quotient of any Riesz monoid endowed with an order-unit of finite stable rank.
Wehrung, Friedrich
core +5 more sources
Heliyon, 2023 This work uses ab-initio CBS-QB3 and density functional theory (B3LYP) to analyze the structure, stability, and aromaticity of all isosteric nitrogen-boron pyrroles.
Safinaz H. El-Demerdash +3 more
doaj
Product structure of heat phase space and branching Brownian motion
, 2003 A generical formalism for the discussion of Brownian processes with non-constant particle number is developed, based on the observation that the phase space of heat possesses a product structure that can be encoded in a commutative unit ring.
Athreya +15 more
core +2 more sources
The relations among invariants of points on the projective line [PDF]
, 2009 We consider the ring of invariants of n points on the projective line. The space (P^1)^n // PGL_2 is perhaps the first nontrivial example of a Geometry Invariant Theory quotient. The construction depends on the weighting of the n points. Kempe discovered
Howard, Ben +3 more
core +4 more sources