Now showing items 1-20 of 163

    • 4-free groups and hyperbolic geometry 

      Culler, Marc; Shalen, Peter B. (Oxford University Press, 2012-02)
      We give new information about the geometry of closed, orientable hyperbolic 3-manifolds with 4-free fundamental group. As an application we show that such a manifold has volume greater than 3.44. This is in turn used to ...
    • An Algebraic Model For Free Rational G-Spectra for Connected Compact Lie Groups G. 

      Greenlees, J. P. C.; Shipley, B. (Springer Verlag, 2011-10)
      We show that the category of free rational G-spectra for a connected compact Lie group G is Quillen equivalent to the category of torsion differential graded modules over the polynomial ring H∗(BG). The ingredients are ...

      Baldwin, JT; Larson, PB; Shelah, S. (Association for Symbolic Logic, 2015)
      Theorem. Suppose that an @0-presentable Abstract Elementary Class (AEC),K, has the joint embedding and amalgamation properties in @0 and < 2@1 models in @1. If K has only countably many models in @1, then all are small. ...
    • Almost galois ω-stable classes 

      Baldwin, JT; Larson, PB; Shelah, S (Association for Symbolic Logic [Society Publisher], 2015-07-22)
    • An Alternate Proof Of Wise's Malnormal Special Quotient Theorem. 

      Agol, I; Groves, D; Manning, JF (Cambridge University Press, 2016)
      We give an alternate proof of Wise's Malnormal Special Quotient Theorem (MSQT), avoiding cubical small cancellation theory. We also show how to deduce Wise's Quasiconvex Hierarchy Theorem from the MSQT and theorems of ...
    • The Amalgamation Spectrum 

      Baldwin, John T.; Kolesnikov, Alexei; Shelah, Saharon (Association for Symbolic Logic, 2009-09)
      We study when classes can have the disjoint amalgamation property for a proper initial segment of cardinals. Theorem A For every natural number k, there is a class Kk defined by a sentence in Lω₁,ω that has no models ...
    • Analysis of presence-only data via semi-supervised learning approaches 

      Wang, Junhui; Fang, Yixin (Elsevier, 2013-03)
      Presence-only data occur in classification, which consist of a sample of observations from presence class and a large number of background observations with unknown presence/absence. Since absence data are generally ...
    • An approximate Bayesian marginal likelihood approach for estimating nite mixtures 

      Martin, Ryan (Taylor & Francis, 2013-08)
      Estimation of nite mixture models when the mixing distribution support is unknown is an important problem. This paper gives a new approach based on a marginal likelihood for the unknown support. Motivated by a Bayesian ...
    • Asymptotic Analysis of a Family of Polynomials Associated with the Inverse Error Function 

      Dominici, Diego; Knessl, Charles (Rocky Mountain Mathematics Consortium, 2012)
      We analyze the sequence of polynomials defined by the differential-difference equation Pn+1(x) = P'(n)(x)+x(n+1)P-n(x) asymptotically as n -> infinity. The polynomials P-n(x) arise in the computation of higher derivatives ...
    • An Asymptotic Expansion and Recursive Inequalities for the Monomer-Dimer Problem 

      Federbush, Paul; Friedland, Shmuel (Springer Verlag, 2011-04)
      Let lambda(d)(p) be the p monomer-dimer entropy on the d-dimensional integer lattice Z(d), where p is an element of [0, 1] is the dimer density. We give upper and lower bounds for lambda(d)(p) in terms of expressions ...
    • An Asymptotic Form for the Stieltjes Constants (Gamma K)(A) and for A Sum S(Gamma)(N) Appearing Under the Li Criterion 

      Knessl, Charles; Coffey, Mark W. (American Mathematical Society, 2011-10)
      We present several asymptotic analyses for quantities associated with the Riemann and Hurwitz zeta functions. We first determine the leading asymptotic behavior of the Stieltjes constants γk(a). These constants appear in ...
    • Banach Spaces Without Minimal Subspaces Examples 

      Ferenczi, Valentin; Rosendal, Christian (Association des Annales de l'Institut Fourier, 2012)
      We analyse several examples of separable Banach spaces, some of them new, and relate them to several dichotomies obtained in [11], by classifying them according to which side of the dichotomies they fall.
    • Bessel models for GSp(4) 

      Prasad, Dipendra; Takloo-Bighash, Ramin (Walter de Gruyter, 2011)
      Methods of theta correspondence are used to analyze local and global Bessel models for GSp4 proving a conjecture of Gross and Prasad which describes these models in terms of local epsilon factors in the local case, and ...
    • Best rank one approximation of real symmetric tensors can be chosen symmetric 

      Friedland, Shmuel (Springer Verlag, 2013-02)
      We show that a best rank one approximation to a real symmetric tensor, which in principle can be nonsymmetric, can be chosen symmetric. Further- more, a symmetric best rank one approximation to a symmetric tensor is ...
    • Categoricity, Amalgamation, and Tameness 

      Baldwin, John T.; Kolesnikov, Alexei (Springer Verlag, 2007)
      Theorem: For each 2 ≤ k < ω there is an Lω1,ω -sentence ϕk such that (1) ϕk is categorical in μ if μ≤ℵk−2; (2) ϕk is not ℵk−2-Galois stable (3) ϕk is not categorical in any μ with μ>ℵk−2; (4) ϕk has the disjoint ...
    • Classification based on a permanental process with cyclic approximation 

      Yang, Jie; Miescke, Klaus; McCullagh, Peter (Oxford University Press, 2012-11)
      We introduce a doubly stochastic marked point process model for supervised classification problems. Regardless of the number of classes or the dimension of the feature space, the model requires only 2–3 parameters for ...
    • Classification of δ-Invariant Amalgamation Classes 

      Aref'ev, Roman D.; Baldwin, John T.; Mazzucco, Marco (Journal of Symbolic Logic, 1999-12)
      Hrushovski's generalization of the Fraisse construction has provided a rich source of examples in model theory, model theoretic algebra and random graph theory. The construction assigns to a dimension function s and a class ...
    • Coarse differentiation of quasi-isometries II: Rigidity for Sol and lamplighter groups 

      Eskin, Alex; Fisher, David; Whyte, Kevin (Princeton University, Department of Mathematics, 2013-05)
      In this paper we prove quasi-isometric rigidity results concerning lattices in Sol and lamplighter groups. The paper builds in a substantial way on our earlier paper Coarse di erentiation of quasi-isometries I: spaces ...
    • A Comparison of Lower Genital Tract Glycogen and Lactic Acid Levels in Women and Macaques: Implications for HIV and SIV Susceptibility 

      Mirmonsef, Paria; Gilbert, Douglas; Veazey, Ronald S.; Wang, Jing; Kendrick, Sabrina R.; Spear, Gregory T. (Mary Ann Liebert, 2012-01)
      Understanding factors that affect eterosexual transmission of HIV in women is of great importance. Lactobacilli in the lower genital tract of women utilize glycogen in vaginal epithelial cells as an energy source and ...