Results 11 to 20 of about 1,175,340 (231)

Euclidean Quadratic Forms and ADC Forms I [PDF]

open access: yes, 2011
Motivated by classical results of Aubry, Davenport and Cassels, we define the notion of a Euclidean quadratic form over a normed integral domain and an ADC form over an integral domain.
Clark, Pete L.
core   +4 more sources

A new closed-form formula for calculating a weakly singular static potential integral with linear current source distribution on a triangle [PDF]

open access: yesBulletin of the Polish Academy of Sciences: Technical Sciences, 2023
The article presents a closed-form formula for solving a weakly singular surface integral with a linear current source distribution associated with the SIE-MoM formulation used for solving electromagnetic (EM) problems.
Anna Grytsko, Piotr Słobodzian
doaj   +1 more source

Remarks on derivations on semiprime rings

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1992
We prove that a semiprime ring R must be commutative if it admits a derivation d such that (i) xy+d(xy)=yx+d(yx) for all x, y in R, or (ii) xy−d(xy)=yx−d(yx) for all x, y in R.
Mohamad Nagy Daif, Howard E. Bell
doaj   +1 more source

Analysis of segregated boundary-domain integral equations for mixed variable-coefficient BVPs in exterior domains [PDF]

open access: yes, 2011
This is the post-print version of the Article. The official published version can be accessed from the link below - Copyright @ 2011 Birkhäuser Boston.Some direct segregated systems of boundary–domain integral equations (LBDIEs) associated with the mixed
B. Hanouzet   +17 more
core   +1 more source

Numerics of boundary-domain integral and integro-differential equations for BVP with variable coefficient in 3D [PDF]

open access: yes, 2012
This is the post-print version of the article. The official published version can be accessed from the links below - Copyright @ 2013 Springer-VerlagA numerical implementation of the direct boundary-domain integral and integro-differential equations ...
A Stroud   +19 more
core   +1 more source

High-order, Dispersionless "Fast-Hybrid" Wave Equation Solver. Part I: $\mathcal{O}(1)$ Sampling Cost via Incident-Field Windowing and Recentering [PDF]

open access: yes, 2020
This paper proposes a frequency/time hybrid integral-equation method for the time dependent wave equation in two and three-dimensional spatial domains.
Anderson, Thomas G.   +2 more
core   +2 more sources

Integrally Closed Subrings of an Integral Domain [PDF]

open access: yesTransactions of the American Mathematical Society, 1971
Let D be an integral domain with identity having quotient field K. This paper gives necessary and sufficient conditions on D in order that each integrally closed subring of D should belong to some subclass of the class of integrally closed domains; some of the subclasses considered are the completely integrally closed domains, Prufer domains, and ...
Gilmer, R., Mott, J.
openaire   +2 more sources

On locally divided integral domains and CPI-overrings

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1981
It is proved that an integral domain R is locally divided if and only if each CPI-extension of ℬ (in the sense of Boisen and Sheldon) is R-flat (equivalently, if and only if each CPI-extension of R is a localization of R).
David E. Dobbs
doaj   +1 more source

Exponents, symmetry groups and classification of operator fractional Brownian motions [PDF]

open access: yes, 2011
Operator fractional Brownian motions (OFBMs) are zero mean, operator self-similar (o.s.s.), Gaussian processes with stationary increments. They generalize univariate fractional Brownian motions to the multivariate context.
Didier, Gustavo, Pipiras, Vladas
core   +3 more sources

Generalization to The AMK Integral Transform and Its Applications [PDF]

open access: yesمجلة جامعة الانبار للعلوم الصرفة
Since the proposal of Laplace to integral transformation in 1780, many integral transformations have been proposed. Some are based on Laplace, and others are totally independent.
Mohanad Salman, Qin Zhao
doaj   +1 more source

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