Now showing items 166-185 of 394

    • Inverse problems 

      Isakov, Victor, 1947- (Springer, 2017)
      In this chapter, we formulate basic inverse problems and indicate their applications. The choice of these problems is not random. We think that it represents their interconnections and some hierarchy.
    • Inverse source problems without (pseudo) convexity assumptions 

      Isakov, Victor, 1947-; Lu, Shuai (American Institute of Mathematical Sciences, 2018-08)
      We study the inverse source problem for the Helmholtz equation from boundary Cauchy data with multiple wave numbers. The main goal of this paper is to study the uniqueness and increasing stability when the (pseudo)convexity ...
    • An investigation of capillary surfaces at non-convex corners 

      Mitchell, Colm Patric (Wichita State University, 2009-12)
      In this thesis we take a close look at the paper CMC Capillary Surfaces at Reentrant Corners [33] a central feature of which is the question of when does the "central fan" of radial limits exist for a capillary graph in a ...
    • Investigations in single layer gravitational potential 

      Stewart, Darrell Anne (Wichita State University, 2010-05)
    • Isochrones for old (> 5 GYR) stars and stellar populations. I. models for-2.4 <= [Fe/H] <=+0.6, 0.25 <= Y <= 0.33, and-0.4 <= [alpha/Fe] <=+0.4 

      VandenBerg, Don A.; Bergbusch, Peter A.; Ferguson, Jason W.; Edvardsson, Bengt (IOP Publishing, 2014-10-10)
      Canonical grids of stellar evolutionary sequences have been computed for the helium mass-fraction abundances Y = 0.25, 0.29, and 0.33, and for iron abundances that vary from 2.4 to +0.4 (in 0.2 dex increments) when [alpha/Fe] ...
    • Isolated fixed point sets for holomorphic maps 

      Fridman, Buma L.; Ma, Daowei; Vigué, Jean-Pierre (Elsevier SAS, 2006-07)
      We study discrete fixed point sets of holomorphic self-maps of complex manifolds. The main attention is focused on the cardinality of this set and its configuration. As a consequence of one of our observations, a bounded ...
    • Isotonic regression through the Merge and Chop Algorithm for application in statistical inference 

      Skala, Jacob Thomas (Wichita State University, 2016-05)
      In this paper, the theory for the application of the Merge and Chop Algorithm are defined and proven. The algorithm is used to find isotonic regressions in more situations than comparable methods. A program is included ...
    • Isotropic covariance matrix functions on all spheres 

      Ma, Chunsheng (Springer International Publishing AG, 2015-08)
      This paper reviews and introduces characterizations of the covariance function on all spheres that is isotropic and continuous, and characterizations of the covariance matrix function on all spheres whose entries are ...
    • Isotropic covariance matrix functions on compact two-point homogeneous spaces 

      Lu, Tianshi; Ma, Chunsheng (Springer, 2019)
      The covariance matrix function is characterized in this paper for a Gaussian or elliptically contoured vector random field that is stationary, isotropic, and mean square continuous on the compact two-point homogeneous ...
    • Isotropic covariance matrix polynomials on spheres 

      Ma, Chunsheng (Taylor & Francis Group, 2016)
      This article characterizes the covariance matrix function of a Gaussian or elliptically contoured vector random field that is stationary, isotropic, and mean square continuous on the sphere. By applying the characterization ...
    • Isotropic positive definite functions on spheres generated from those in Euclidean spaces 

      Nie, Zhihui (Wichita State University, 2019-05)
      In this thesis, author have reviewed the classical characterizations of isotropic positive definite functions on Euclidean spaces and spheres, and had applied them to develop a construction of isotropic positive de nite ...
    • Isotropic random fields with infinitely divisible marginal distributions 

      Wang, Fangfang; Leonenko, Nikolai; Ma, Chunsheng (Taylor & Francis, 2018)
      A simple but efficient approach is proposed in this paper to construct the isotropic random field in (d 2), whose univariate marginal distributions may be taken as any infinitely divisible distribution with finite variance. ...
    • Isotropic two-dimensional pseudo-Riemannian metrics uniquely constructed by a given curvature 

      Bukhgeim, Alexander L.; Khanfer, Ammar (Elsevier, 2018-01)
      We prove a global uniqueness theorem of reconstruction of a two-dimensional pseudo metric by a given Gaussian curvature.
    • Isotropic variogram matrix functions on spheres 

      Du, Juan; Ma, Chunsheng; Li, Yang (SPRINGER, 2013-04)
      This paper is concerned with vector random fields on spheres with second-order increments, which are intrinsically stationary and mean square continuous and have isotropic variogram matrix functions. A characterization of ...
    • K-combined random fields: Basic properties and stochastic orderings 

      Chen, Boming; Wang, Fangfang; Ma, Chunsheng (Taylor and Francis, 2021-05-17)
      This paper introduces the K-combined vector random field, whose finite-dimensional characteristic functions are made up of certain power functions and whose finite-dimensional density functions are comprised of the modified ...
    • K-differenced vector random fields 

      Alsultan, Rehab; Ma, Chunsheng (SIAM Publ., 2019)
      A thin-tailed vector random field, referred to as a K-differenced vector random field, is introduced. Its finite-dimensional densities are the differences of two Besse! functions of second order, whenever they exist, and ...
    • K-distributed vector random fields in space and time 

      Ma, Chunsheng (Elsevier, 2013-04)
      This paper introduces two types of second-order vector random fields or stochastic processes whose marginals are K-distributed, through certain mixture procedures. The first type is formulated as an independent product of ...
    • Kahler-Einstein metrics with edge singularities 

      Jeffres, Thalia D.; Mazzeo, Rafe; Rubinstein, Yanir A. (Princeton University, 2016-01)
      This article considers the existence and regularity of Kahler Einstein metrics on a compact Kahler manifold M with edge singularities with cone angle 2 pi beta along a smooth divisor D. We prove existence of such metrics ...
    • Learning quantum annealing 

      Behrman, Elizabeth C.; Steck, James E.; Moustafa, Mohamed A. (Rinton Press, Inc., 2017-05-01)
      We propose and develop a new procedure, whereby a quantum system can learn to anneal to a desired ground state. We demonstrate successful learning to produce an entangled state for a two-qubit system, then demonstrate ...
    • Linear stability of Hill's vortex to axisymmetric perturbations 

      Protas, Bartosz; Elcrat, Alan R. (Cambridge University Press, 2016-07)
      We consider the linear stability of Hill's vortex with respect to axisymmetric perturbations. Given that Hill's vortex is a solution of a free-boundary problem, this stability analysis is performed by applying methods of ...