Results 41 to 50 of about 359,552 (281)

Constants are Definable in Rings of Analytic Functions [PDF]

open access: yesProceedings of the American Mathematical Society, 1994
The analytic functions defined in a fixed domain form a ring with pointwise addition and multiplication. We describe a way to define constants in the ring using a first-order formula which is independent of the domain.
openaire   +1 more source

Highly Sensitive and Selective Colorimetric and Off-On Fluorescent Reversible Chemosensors for Al3+ Based on the Rhodamine Fluorophore

open access: yesSensors, 2015
A series of rhodamine derivatives L1–L3 have been prepared and characterized by IR, 1H-NMR, 13C-NMR and ESI-MS. These compounds exhibited selective and sensitive “turn-on” fluorescent and colorimetric responses to Al3+ in methanol.
Naveen Mergu   +2 more
doaj   +1 more source

Constants of Algebraic Derivations in Prime Rings

open access: yesCommunications in Algebra, 2008
Let R be a prime ring with extended centroid F and δ an F-algebraic derivation of R with the associated inner derivation ad(b). Set , the subring of constants of δ in R. We characterize the primeness and semiprimeness of R (δ) by the minimal polynomial μ(λ) of b over F.
Chuang, C.-L, Lee, T.-K, Zhou, Y.
openaire   +2 more sources

Interpolation inequalities and spectral estimates for magnetic operators [PDF]

open access: yes, 2018
We prove magnetic interpolation inequalities and Keller-Lieb-Thir-ring estimates for the principal eigenvalue of magnetic Schr{\"o}dinger operators. We establish explicit upper and lower bounds for the best constants and show by numerical methods that ...
Dolbeault, Jean   +3 more
core   +2 more sources

A variant of the large sieve inequality with explicit constants

open access: yesJournal of Mathematical Cryptology, 2020
We give an effective version with explicit constants of the large sieve inequality for imaginary quadratic fields. Explicit results of this kind are useful for estimating the computational complexity of algorithms which generate elements, whose norm is a
Grześkowiak Maciej
doaj   +1 more source

From Molecular to Cluster Properties: Rotational Spectroscopy of 2-Aminopyridine and of Its Biomimetic Cluster with Water

open access: yesMolecules, 2021
We report the observation and analysis of the rotational spectrum of a 1:1 cluster between 2-aminopyridine and water (AMW) carried out with supersonic expansion Fourier transform microwave spectroscopy at 4.7–16.5 GHz. Measurements of the 2-aminopyridine
Adam Kraśnicki   +2 more
doaj   +1 more source

Completion of the Conjecture: Quantum Cohomology of Fano Hypersurfaces

open access: yes, 1999
In this paper, we propose the formulas that compute all the rational structural constants of the quantum K\"ahler sub-ring of Fano hypersurfaces.Comment: 19pages, Latex, minor changes in English, some formulas are ...
Beauville A., MASAO JINZENJI
core   +1 more source

The chiral ring of a symmetric orbifold and its large N limit

open access: yesJournal of High Energy Physics, 2023
We analyze the chiral operator ring of the symmetric orbifold conformal field theory on the complex two-plane ℂ2. We compute the large N limit of the ring and exhibit its factorized leading order behaviour.
Sujay K. Ashok, Jan Troost
doaj   +1 more source

Scattering of Open and Closed Strings in 1+1 Dimensions

open access: yes, 1992
The ground ring structure of 1+1 dimensional string theory leads to an infinite set of non linear recursion relations among the `bulk' scattering amplitudes of open and closed tachyons on the disk, which fix them uniquely.
Bershadsky   +24 more
core   +2 more sources

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