Now showing items 35-54 of 163

    • Derived Invariance of the Number of Holomorphic 1-Forms and Vector Fields 

      Popa, M.; Schnell, C. (Elsevier Masson, 2011-05)
    • Determinants of HIV-induced brain changes in three different periods of the early clinical course: A data mining analysis. 

      Cao, B; Kong, X; Kettering, C; Yu, P; Ragin, A (Elsevier Inc., 2015-08-01)
      To inform an understanding of brain status in HIV infection, quantitative imaging measurements were derived at structural, microstructural and macromolecular levels in three different periods of early infection and then ...
    • Diversionary Comments under Blog Posts. 

      Wang, J; Yu, CT; Yu, PS; Liu, B; Meng, WY (Association for Computing Machinery (ACM), 2015-10)
      There has been a recent swell of interest in the analysis of blog comments. However, much of the work focuses on detecting comment spam in the blogsphere. An important issue that has been neglected so far is the identification ...
    • An Effective Asymptotic Formula for the Stieltjes Constants 

      Knessl, Charles; Coffey, Mark W. (American Mathematical Society, 2011-01)
      The Stieltjes constants gamma(k) appear in the coefficients in the regular part of the Laurent expansion of the Riemann zeta function zeta(s) about its only pole at s = 1. We present an asymptotic expression for gamma(k) ...
    • Effective Cones of Cycles on Blow-ups of Projective Space 

      Coskun, Izzet; Lesieutre, John; Ottem, John Christian (Mathematical Sciences Publishers, 2016-03-15)
      In this paper, we study the cones of higher codimension (pseudo)effective cycles on point blow-ups of projective space. We determine bounds on the number of points for which these cones are generated by the classes of ...
    • Examples of Non-Locality 

      Baldwin, John T.; Shelah, Saharon (Association for Symbolic Logic, 2008-09)
      We use kappa-free but not Whitehead Abelian groups to construct Abstract Elementary Classes (AEC) which satisfy the amalgamation property but fail various conditions on the locality of Galois-types. We introduce the notion ...
    • Extremal higher codimension cycles on moduli spaces of curves. 

      Chen, D; Coskin, I (London Mathematical Society, 2015)
      We show that certain geometrically defined higher codimension cycles are extremal in the effective cone of the moduli space Mg,n of stable genus g curves with n ordered marked points. In particular, we prove that codimension ...
    • Finitely Approximable Groups and Actions Part I: the Ribes-Zalesskii Property 

      Rosendal, Christian (Association for Symbolic Logi, 2011)
      We investigate extensions of S. Solecki’s theorem on closing off finite partial isometries of metric spaces [11] and obtain the following exact equivalence: any action of a discrete group Γ by isometries of a metric space ...
    • Finitely Approximate Groups and Actions Part II: Generic Representations 

      Rosendal, Christian (Association for Symbolic Logic, 2011-12)
      Given a finitely generated group Γ, we study the space Isom(Γ,QU) of all actions of Γ by isometries of the rational Urysohn metric space QU, where Isom(Γ, QU) is equipped with the topology it inherits seen as a closed ...
    • Fully invariant and verbal congruence relations 

      Bergman, Clifford; Berman, Joel (Springer Verlag, 2013-08)
      A congruence relation theta on an algebra A is fully invariant if every endomorphism of A preserves theta. A congruence theta is verbal if there exists a variety such that theta is the least congruence of A such that . ...
    • Geometric and Analytic Quasiconformality in Metric Measure Spaces 

      Williams, Marshall (American Mathematical Society, 2012-04)
      We prove the equivalence between geometric and analytic definitions of quasiconformality for a homeomorphism f : X → Y between arbitrary locally finite separable metric measure spaces, assuming no metric hypotheses on ...
    • Geometric Optics and Instability for NLS and Davey-Stewartson Models 

      Carles, Remi; Dumas, Eric; Sparber, Christof (European Mathematical Society, 2012-06)
      We study the interaction of (slowly modulated) high frequency waves for multi-dimensional nonlinear Schr odinger equations with gauge invariant power-law nonlinearities and nonlocal perturbations. The model includes the ...
    • The Geometry of the Critically-Periodic Curves in the Space of Cubic Polynomials 

      De Marco, Laura; Schiff, Aaron (AK Peters, 2013-01)
      We provide an algorithm for computing the Euler characteristic of the curves in consisting of all polynomials with a periodic critical point of period p in the space of critically marked complex cubic polynomials. The ...
    • Global Well-Posedness For A System OF KdV-Type Equations With Coupled Quadratic Nonlinearities 

      BONA, J.; Cohen, J.; Wang, G. (Duke University Press, 2014)
      In this paper, coupled systems ut + uxxx + P(u, v)x = 0, vt + vxxx + Q(u, v)x = 0, of KdV-type are considered, where u = u(x, t), v = v(x, t) are real-valued functions and x, t ∈ R. Here, subscripts connote partial ...
    • Global well-posedness for a system of KdV-type equations with coupled quadratic nonlinearities. 

      Bona, J.; Cohen, J.; Wang, G. (Duke University Press, 2014)
      In this paper, coupled systems ut + uxxx + P(u, v)x = 0, vt + vxxx + Q(u, v)x = 0, of KdV-type are considered, where u = u(x, t), v = v(x, t) are real-valued functions and x, t ∈ R. Here, subscripts connote partial ...
    • Ground State Properties of Graphene In Hartree-Fock Theory 

      Hainzl, Christian; Lewin, Mathieu; Sparber, Christof (American Institute of Physics, 2012-09)
      We study the Hartree-Fock approximation of graphene in in - nite volume, with instantaneous Coulomb interactions. First we construct its translation-invariant ground state and we recover the well-known fact that, due to ...
    • A Hanf number for saturation and omission 

      Baldwin, John T.; Shelah, Saharon (Polish Academy of Sciences, Institute of Mathematics, 2011-04)
      Suppose t = (T, T1, p) is a triple of two countable theories T ⊆ T1 in vocabularies τ ⊂ τ1 and a τ1-type p over the empty set. We show the Hanf number for the property: There is a model M1 of T1 which omits p, but M1 ↾ τ ...