Central European Journal of Mathematics

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Anti-invariant Riemannian submersions from almost Hermitian manifolds
Central European Journal of Mathematics - Tập 8 - Trang 437-447 - 2010
Bayram Ṣahin
We introduce anti-invariant Riemannian submersions from almost Hermitian manifolds onto Riemannian manifolds. We give an example, investigate the geometry of foliations which are arisen from the definition of a Riemannian submersion and check the harmonicity of such submersions. We also find necessary and sufficient conditions for a Langrangian Riemannian submersion, a special anti-invariant Riema...... hiện toàn bộ
Ground states for asymptotically periodic Schrödinger-Poisson systems with critical growth
Central European Journal of Mathematics - Tập 12 - Trang 1484-1499 - 2014
Hui Zhang, Junxiang Xu, Fubao Zhang, Miao Du
For a class of asymptotically periodic Schrödinger-Poisson systems with critical growth, the existence of ground states is established. The proof is based on the method of Nehari manifold and concentration compactness principle.
On variational impulsive boundary value problems
Central European Journal of Mathematics - Tập 10 - Trang 1969-1980 - 2012
Marek Galewski
Using the variational approach, we investigate the existence of solutions and their dependence on functional parameters for classical solutions to the second order impulsive boundary value Dirichlet problems with L1 right hand side.
Hilbert algebras as implicative partial semilattices
Central European Journal of Mathematics - Tập 5 - Trang 264-279 - 2007
Jānis Cīrulis
The infimum of elements a and b of a Hilbert algebra are said to be the compatible meet of a and b, if the elements a and b are compatible in a certain strict sense. The subject of the paper will be Hilbert algebras equipped with the compatible meet operation, which normally is partial. A partial lower semilattice is shown to be a reduct of such an expanded Hilbert algebra i ?both algebras have th...... hiện toàn bộ
F-limit points in dynamical systems defined on the interval
Central European Journal of Mathematics - - 2012
Piotr Szuca
Given a free ultrafilter p on ℕ we say that x ∈ [0, 1] is the p-limit point of a sequence (x n ) n∈ℕ ⊂ [0, 1] (in symbols, x = p -lim n∈ℕ x n ) if for every neighbourhood V of x, {n ∈ ℕ: x n ...... hiện toàn bộ
The Lindelöf number of C p (X)×C p (X) for strongly zero-dimensional X
Central European Journal of Mathematics - Tập 9 Số 5 - Trang 978-983 - 2011
Oleg Okunev
The structure and representation of n-ary algebras of DNA recombination
Central European Journal of Mathematics - Tập 9 - Trang 1193-1216 - 2011
Sergei R. Sverchkov
In this paper we investigate the structure and representation of n-ary algebras arising from DNA recombination, where n is a number of DNA segments participating in recombination. Our methods involve a generalization of the Jordan formalization of observables in quantum mechanics in n-ary splicing algebras. It is proved that every identity satisfied by n-ary DNA recombination, with no restriction ...... hiện toàn bộ
Iterative algorithms for variational inclusions, mixed equilibrium and fixed point problems with application to optimization problems
Central European Journal of Mathematics - Tập 9 - Trang 640-656 - 2011
Yonghong Yao, Yeol Je Cho, Yeong-Cheng Liou
In this paper, we introduce an iterative algorithm for finding a common element of the set of solutions of a mixed equilibrium problem, the set of fixed points of a nonexpansive mapping, and the the set of solutions of a variational inclusion in a real Hilbert space. Furthermore, we prove that the proposed iterative algorithm converges strongly to a common element of the above three sets, which is...... hiện toàn bộ
A brief review of some application driven fast algorithms for elliptic partial differential equations
Central European Journal of Mathematics - Tập 10 - Trang 204-216 - 2011
Prabir Daripa
Some application driven fast algorithms developed by the author and his collaborators for elliptic partial differential equations are briefly reviewed here. Subsequent use of the ideas behind development of these algorithms for further development of other algorithms some of which are currently in progress is briefly mentioned. Serial and parallel implementation of these algorithms and their appli...... hiện toàn bộ
Rank 4 vector bundles on the quintic threefold
Central European Journal of Mathematics - Tập 3 - Trang 404-411 - 2005
Carlo Madonna
By the results of the author and Chiantini in [3], on a general quintic threefold X⊂P 4 the minimum integer p for which there exists a positive dimensional family of irreducible rank p vector bundles on X without intermediate cohomology is at least three. In this paper we show that p≤4, by constructing series of positive dimensional families of rank 4 vector bundles on X without in...... hiện toàn bộ
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