Results 81 to 90 of about 351,850 (226)

Quantum cohomology of the Lagrangian Grassmannian

open access: yes, 2003
Let V be a symplectic vector space and LG be the Lagrangian Grassmannian which parametrizes maximal isotropic subspaces in V. We give a presentation for the (small) quantum cohomology ring QH^*(LG) and show that its multiplicative structure is determined
Kresch, Andrew, Tamvakis, Harry
core   +1 more source

A note on characterizations of rings of constants with respect to derivations [PDF]

open access: yesColloquium Mathematicum, 2004
Summary: Let \(A\) be a commutative algebra without zero divisors over a field \(k\). If \(A\) is finitely generated over \(k\), then there exist well known characterizations of all \(k\)-subalgebras of \(A\) which are rings of constants with respect to \(k\)-derivations of \(A\) [see e.g. \textit{P. Jȩdrzejewicz}, Commun.
openaire   +3 more sources

Chiral Symmetry transition in the Linear Sigma Model with quarks: Counting effective QCD degrees of freedom from low to high temperature

open access: yes, 2016
We use the linear sigma model coupled to quarks, together with a plausible location of the critical end point (CEP), to study the chiral symmetry transition in the QCD phase diagram. We compute the effective potential at finite temperature and density up
Ayala, Alejandro   +5 more
core   +1 more source

Photonic Crystal Fiber Modal Interferometer for Refractive Index Sensing

open access: yesCommunications, 2013
We present a modification of core-cladding intermodal interferometer for refractive index sensing. Its structure consists of double cladding photonic crystal fiber (PCF) as a sensing element.
Daniel Kacik, Peter Tatar
doaj   +1 more source

Rings and fields of constants for derivations in characteristic zero

open access: yesJournal of Pure and Applied Algebra, 1994
Let \(K\) be a field of characteristic zero and \(L\) be a field extension of \(K\). \textit{S. Suzuki} [J. Math. Kyoto Univ. 21, 375--382 (1981; Zbl 0496.12018)] and \textit{J. Derksen} [Report 9123, Catholic Univ. Nijmegen (1991)] have shown that if \(L\) has finite transcendence degree and \(F\) is an intermediate field between \(K\) and \(L\), then
openaire   +3 more sources

Quantum Chemical Calculations on CHOP Derivatives—Spanning the Chemical Space of Phosphinidenes, Phosphaketenes, Oxaphosphirenes, and COP Isomers

open access: yesMolecules, 2018
After many decades of intense research in low-coordinate phosphorus chemistry, the advent of Na[OCP] brought new stimuli to the field of CHOP isomers and derivatives thereof.
Alicia Rey   +2 more
doaj   +1 more source

Strain rotation coupling and its implications on the measurement of rotational ground motions [PDF]

open access: yes, 2018
Spatial derivatives of the seismic wave field are known to be sensitive to various site effects (e.g., cavity effects, topography, and geological inhomogeneities).
Igel, Heiner   +4 more
core  

Picolinic acid promoted oxidative decarboxylation of phenylsulfinylacetic acid by Cr(VI)

open access: yesBulletin of the Chemical Society of Ethiopia, 2016
The kinetics and mechanism of picolinic acid promoted reaction of phenylsulfinylacetic acid (PSAA) with Cr(VI) was carried out in aqueous acetonitrile medium under pseudo first order conditions. The reaction follows Michaelis-Menten type of kinetics with
P. Subramaniam, N. T. Selvi
doaj   +1 more source

Tropospheric Degradation of Perfluorinated Aromatics: A Case of Hexafluorobenzene

open access: yesCroatica Chemica Acta, 2015
The major tropospheric removal process for hexafluorobenzene is its oxidation by hydroxyl (OH) radicals. However, there is no information on the reaction mechanism of this important process.
Goran Kovačević, Aleksandar Sabljić
doaj   +1 more source

Coordination Chemistry of Glycolic Acid and Uranyl

open access: yesYuanzineng kexue jishu
Glycolic acid (α-hydroxyacetic acid, HA) is a simple, water-soluble carboxylic acid ligand commonly found in the environment. It can coordinate with metal ions through both its carboxyl and hydroxyl oxygen atoms.
ZENG Deli1, LIU Qian1, YANG Qi1, LI Jiale1, PU Tongkai1, YANG Suliang1, TIAN Guoxin1, 2
doaj   +1 more source

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