Results 1 to 10 of about 237,709 (263)
Solution of a two-dimensional parabolic model problem in a degenerate angular domain [PDF]
Қарағанды университетінің хабаршысы. Математика сериясы, 2023 In this paper, the boundary value problem of heat conduction in a domain was considered, boundary of which changes with time, as well as there is no the problem solution domain at the initial time, that is, it degenerates into a point.
M.I. Ramazanov +2 more
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Nilpotent Lie algebras of derivations with the center of small corank
Karpatsʹkì Matematičnì Publìkacìï, 2020 Let $\mathbb K$ be a field of characteristic zero, $A$ be an integral domain over $\mathbb K$ with the field of fractions $R=Frac(A),$ and $Der_{\mathbb K}A$ be the Lie algebra of all $\mathbb K$-derivations on $A$. Let $W(A):=RDer_{\mathbb K} A$ and $L$
Y.Y. Chapovskyi +2 more
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Mechanical Engineering Journal, 2022 In this paper, a domain integral method to evaluate the J-integral along with a singular patch method for three-dimensional linear elastic fracture mechanics analyses using Isogeometric analysis (IGA) are presented.
Omar TABAZA +2 more
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Integrally Closed Subrings of an Integral Domain [PDF]
Transactions 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.
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On the uniqueness of linear convection–diffusion equations with integral boundary conditions
Comptes Rendus. Mathématique, 2023 We investigate a class of convection–diffusion equations in an expanding domain involving a parameter, where we consider integral boundary conditions that depend non-locally on unknown solutions.
Lee, Chiun-Chang +2 more
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The w-integral closure of integral domains
Journal of Algebra, 2006 Let \(D\) be an integral domain with quotient field qf\((D)=K\). Recall that an element \(x \in K\) is called \(w\)-integral [respectively: pseudo-integral (or \(v\)-integral)] on \(D\) if \( xI^w \subseteq I^w\) [respectively: \(xI^v \subseteq I^v\)] for some nonzero finitely generated ideal \(I\) of \(D\). The authors denote by \(D^w\) [respectively:
Chang, Gyu Whan, Zafrullah, Muhammad
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An accelerated hybrid TLM-IE method for the investigation of shielding effectiveness [PDF]
Advances in Radio Science, 2010 A hybrid numerical technique combining time-domain integral equations (TD-IE) with the transmission line matrix (TLM) method is presented for the efficient modeling of transient wave phenomena.
N. Fichtner, P. Russer
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Dp-Minimal integral domains [PDF]
Israel Journal of Mathematics, 2021 It is shown that every dp-minimal integral domain $R$ is a local ring and for every non-maximal prime ideal $\mathfrak p $ of $R$, the localization $R_{\mathfrak p }$ is a valuation ring and $\mathfrak{p}R_{\mathfrak{p}}=\mathfrak{p}$. Furthermore, a dp-minimal integral domain is a valuation ring if and only if its residue field is infinite or its ...
D'Elbée, Christian, Halevi, Yatir
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Remarks on derivations on semiprime rings
International 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
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A new closed-form formula for calculating a weakly singular static potential integral with linear current source distribution on a triangle [PDF]
Bulletin 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
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