Now showing items 41-50 of 314
On the regularity of the pressure field of relaxed solutions to Euler equations with variable density
(Journal of Mathematical Analysis and Applications, 2014-01-01) [Artigo]
In this paper we improve the regularity in time of the gradient of the pressure field in the solution of relaxed version of variational formulation proposed by V. I. Arnold and by Y. Brenier, for the incompressible Euler ...
On the injectivity of C1 maps of the real plane
(Canadian Journal of Mathematics, 2002-12-01) [Artigo]
Let X : ℝ2 → ℝ2 be a C1 map. Denote by Spec(X) the set of (complex) eigenvalues of DXp when p varies in ℝ2. If there exists ε > 0 such that Spec(X) ∩ (-ε, ε) = ∅, then X is injective. Some applications of this result to ...
On Witt rings of quaternion algebras over 1-Hilbert fields
(Communications in Algebra, 2003-02-01) [Artigo]
A note on units of finite local rings in an ascending chain
(International Journal of Applied Mathematics, 2012) [Artigo]
In this paper we present matrices over unitary finite commutative local rings connected through an ascending chain of containments, whose elements are units of the corresponding rings in the chain such that the McCoy ranks ...
Goppa codes through generalized polynomials and its decoding principle
(International Journal of Applied Mathematics, 2010) [Artigo]
Goppa codes through polynomials of B[X;(1/3^2)Z_0] and its decoding principle
(International Journal of Applied Mathematics, 2011) [Artigo]
Constructions and decoding of a sequence of BCH codes
(Mathematical Sciences Research Journal, 2012) [Artigo]
On exact boundary controllability for linearly coupled wave equations
(Journal of Mathematical Analysis and Applications, 2011-09-15) [Artigo]
In this paper we study exact boundary controllability for a system of two linear wave equations coupled by lower order terms. We obtain square integrable control of Neuman type for initial state with finite energy, in ...
Discussion on the limit cycles of the Lev Ginzburg equation by M. Bellamy and R.E. Mickens, Journal of Sound and Vibration 308 (2007) 337-342
(Journal of Sound and Vibration, 2012-11-05) [Editorial]
The authors M. Bellamy and R.E. Mickens in the article "Hopf bifurcation analysis of the Lev Ginzburg equation" published in Journal of Sound and Vibration 308 (2007) 337-342, claimed that this differential equation in the ...
On computing discriminants of subfields of Q(zeta(pr))
(Journal of Number Theory, 2002-10-01) [Artigo]
The conductor-discriminant formula, namely, the Hasse Theorem, states that if a number field K is fixed by a subgroup H of Gal(Q(zeta(n))/Q), the discriminant of K can be obtained from H by computing the product of the ...