Recent Submissions

  • On the Levy-Raikov-Marcinkiewicz theorem 

    Ostrovskii, I.; Ulanovskii, A. (Elsevier, 2004-08-01)
    Let μ be a finite non-negative Borel measure. The classical Lévy-Raikov-Marcinkiewicz theorem states that if its Fourier transform μ̂ can be analytically continued to some complex half-neighborhood of the origin containing ...
  • Infinite products of finite simple-groups 

    Saxl, J.; Shelah, S.; Thomas, S. (, 1996)
    We classify the sequences hSn j n 2 Ni of nite simple nonabelian groups such that Q n Sn has uncountable co nality.
  • Duality for Ideals in the Grassmann Algebra 

    Dibag, I. (Elsevier, 1996-07-01)
    A duality is established between left and right ideals of a finite dimensional Grassmann algebra such that if under the duality a left ideal I and a right ideal J correspond then I is the left annihilator of J and J the ...
  • Backlund transformations for discrete Painleve equations: Discrete P-II-P-V 

    Sakka, A.; Mugan, U. (Elsevier, 2006)
    Transformation properties of discrete Painleve´ equations are investigated by using an algorithmic method. This method yields explicit transformations which relates the solutions of discrete Painleve´ equations, discrete ...
  • Random walks on symmethric spaces and inequalities for matrix spectra 

    Klyachko, A. (Elsevier, 2000-11-01)
    Using harmonic analysis on symmetric spaces we reduce the singular spectral problem for products of matrices to the recently solved spectral problem for sums of Hermitian matrices. This proves R.C. Thompson’s conjecture ...
  • On construction of recursion operators from Lax representation 

    Gurses, M.; Karasu, A.; Sokolov, V. V. (American Institute of Physics, 1999-12)
    In this work we develop a general procedure for constructing the recursion operators for nonlinear integrable equations admitting Lax representation. Several new examples are given. In particular, we find the recursion ...
  • Set covering and Serre's theorem on the cohomology algebra of a p-group 

    Yalcin, E. (Elsevier, 2001-11-1)
    We define a group theoretical invariant, denoted by s(G), as a solution of a certain set covering problem and show that it is closely related to chl(G), the cohomology length of a p-group G. By studying s(G) we improve the ...
  • Dynamical Systems and Poisson Structures 

    Gurses, M.; Guseinov, G. Sh.; Zheltukhin, K. (American Institute of Physics, 2009)
    We first consider the Hamiltonian formulation of n=3 systems, in general, and show that all dynamical systems in ℝ3 are locally bi-Hamiltonian. An algorithm is introduced to obtain Poisson structures of a given dynamical ...
  • On contractibility of th orbit space of a G-poset of Brauer pairs 

    Barker, L. (Elsevier, 1999-02-15)
    Given ap-blockbof a finite groupG, we show that theG-poset of Brauer pairs strictly containing (1,b) has contractibleG-orbit space. A similar result is proved for certainG-posets ofp-subgroups. Both results generalise P. ...
  • Absolute continuity for operator valued completely positive maps on C* -algebras 

    Gheondea, A.; Kavruk, A. S. (American Institute of Physics, 2009-02-11)
    Motivated by applicability to quantum operations, quantum information, and quantum probability, we investigate the notion of absolute continuity for operator valued completely positive maps on C* -algebras, previously ...
  • Closed Embeddings of Hilbert Spaces 

    Cojuhari, P.; Gheondea, A. (Elsevier, 2010-09-01)
    Motivated by questions related to embeddings of homogeneous Sobolev spaces and to comparison of function spaces and operator ranges, we introduce the notion of closely embedded Hilbert spaces as an extension of that of ...
  • Continuum quantum systems as limits of discrete quantum systems. III. Operators 

    Barker, L. (American Institute of Physics, 2001-10)
    Convergence of a "discrete" operator to a "continuum" operator is defined. As examples, the circular rotor, the one-dimensional box, the harmonic oscillator, and the fractional Fourier transform are realized as limits of ...
  • Closely embedded Krein spaces and applications to Dirac operators 

    Cojuhari, P.; Gheondea, A. (Elsevier, 2011-04-15)
    Motivated by energy space representation of Dirac operators, in the sense of K. Friedrichs, we recently introduced the notion of closely embedded Krein spaces. These spaces are associated to unbounded selfadjoint operators ...
  • Elementary proofs of some identities of Ramanujan for the Rogers-Ramanujan functions 

    Yesilyurt, H. (Elsevier, 2012-04-01)
    In a handwritten manuscript published with his lost notebook, Ramanujan stated without proofs forty identities for the Rogers-Ramanujan functions. With one exception all of Ramanujan's identities were proved. In this paper, ...
  • Explicit separating invariants for cyclic p-groups 

    Sezer, M. (Elsevier, 2011-02)
    We consider a finite-dimensional indecomposable modular representation of a cyclic p-group and we give a recursive description of an associated separating set: We show that a separating set for a representation can be ...
  • New identities for 7-cores with prescribed BG-rank 

    Berkovich, A.; Yesilyurt, H. (Elsevier, 2008-11-28)
    Let π be a partition. BG-rank(π) is defined as an alternating sum of parities of parts of π [A. Berkovich, F.G. Garvan, On the Andrews-Stanley refinement of Ramanujan's partition congruence modulo 5 and generalizations, ...
  • Poisson structure of dynamical-systems with 3 degrees of freedom 

    Gumral, H.; Nutku, Y. (American Institute of Physics, 1993)
    It is shown that the Poisson structure of dynamical systems with three degrees of freedom can be defined in terms of an integrable one-form in three dimensions. Advantage is taken of this fact and the theory of foliations ...
  • Reducts of random hypergraphs 

    Thomas, S. (Elsevier, 1996-08-05)
    For each k > 1, let rk be the countable universal homogeneous k-hypergraph. In this paper, we shall classify the closed permutation groups G such that AUt(rk ) < G < &vn(rk). In particular, we shall show that there exist ...
  • Second-order second-degree Painleve equations related with Painleve I-IV equations and Fuchsian-type transformations 

    Mugan, U.; Sakka, A. (American Institute of Physics, 1999-07)
    One-to-one correspondence between the Painlevé I-VI equations and certain second-order second-degree equations of Painlevé type is investigated. The transformation between the Painlevé equations and second-order second-degree ...
  • Some identities and asymptotics for characters of the symmetric group 

    Klyachko, A.; Kurtaran, E. (Elsevier, 1998-08-15)

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