Results 11 to 20 of about 77,990 (262)

Subring of constants of a ring of characteristic p>0

open access: yesLe Matematiche, 1993
Let A be a local ring of characteristic p>0 which has a p-basis over a subring C, and B be the subring of constants of A for a derivation (or derivations ) of A over C. We give a sufficient condition for B to have a p-basis over C. We add some examples.
Marilena Crupi
doaj   +3 more sources

Remarks on rings of constants of derivations [PDF]

open access: yesProceedings of the American Mathematical Society, 1989
Let k k be a field of characteristic
openaire   +1 more source

Branching rules in the ring of superclass functions of unipotent upper-triangular matrices [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2009
It is becoming increasingly clear that the supercharacter theory of the finite group of unipotent upper-triangular matrices has a rich combinatorial structure built on set-partitions that is analogous to the partition combinatorics of the classical ...
Nathaniel Thiem
doaj   +1 more source

Study on polarized piezoceramics constant techniques definition (Part 2)

open access: yesAdvanced Engineering Research, 2017
Introduction. The complete set of all ten electro-elastic moduli of the polarized ceramics essential for the analysis of piezoceramic sensing elements of various devices under the numerical solution to boundary value problems by the finite element method
Victor V. Madorsky
doaj   +1 more source

The topological symmetric orbifold

open access: yesJournal of High Energy Physics, 2020
We analyze topological orbifold conformal field theories on the symmetric product of a complex surface M. By exploiting the mathematics literature we show that a canonical quotient of the operator ring has structure constants given by Hurwitz numbers ...
Songyuan Li, Jan Troost
doaj   +1 more source

Investigating the impact of chemical structures on the photocatalytic degradation rates over ZnO nanorods: An oxidative pathways perspective

open access: yesCatalysis Communications, 2023
Zinc oxide (ZnO) nanorods were coated on glass substrates and used as photocatalysts to evaluate the kinetic behavior of three different aromatic structures: i) single aromatic ring (phenol), ii) poly-aromatic ring (methylene blue), and iii) complex ...
Elie A. Daher   +3 more
doaj   +1 more source

The AdS 3 × S 1 chiral ring

open access: yesJournal of High Energy Physics, 2021
We study AdS 3 × S 1 × Y supersymmetric string theory backgrounds with Neveu-Schwarz-Neveu-Schwarz flux that are dual to N $$ \mathcal{N} $$ = 2 superconformal theories on the boundary. We classify all worldsheet vertex operators that correspond to space-
Sujay K. Ashok, Songyuan Li, Jan Troost
doaj   +1 more source

The Structural Design of a Complete Band Gap using Non-Uniform Photonic Crystals with Low Index Material

open access: yesMajlesi Journal of Electrical Engineering, 2023
This study presents a photonic bandgap formation in a non-uniform 2D photonic crystal structure with low index rods relative to the air background. In order to find an absolute photonic band gap formation, photonic lattices of two non-uniform square and ...
Seyed Mohammad Zare   +3 more
doaj   +1 more source

Prime rings with PI rings of constants

open access: yesIsrael Journal of Mathematics, 1996
20 pages, LaTex2e, to appear in Israel Journal of Mathematics, volume 96, part B, 1996 (357-377)
Kharchenko, V. K.   +2 more
openaire   +3 more sources

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

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