Now showing items 1-20 of 615

    • An efficient multigrid strategy for large-scale molecular mechanics optimization 

      Chen J.; García-Cervera C.J. (Journal of Computational Physics, 2017-08-01)
      Static mechanical properties of materials require large-scale nonlinear optimization of the molecular mechanics model under various controls. This paper presents an efficient multigrid strategy to solve such problems. This ...
    • Euler reflexion formulas for motivic multiple zeta functions 

      Thuong L.Q.; Nguyen H.D. (Journal of Algebraic Geometry, 2017-05-14)
      We introduce a new notion of $\boxast$-product of two integrable series with coefficients in distinct Grothendieck rings of algebraic varieties, preserving the integrability of and commuting with the limit of rational ...
    • A quantitative approach to weighted Carleson condition 

      Rivera-Ríos I.P. (Concrete Operators, 2017-05-05)
      Quantitative versions of weighted estimates obtained by F. Ruiz and J.L. Torrea for the operator \[ \mathcal{M}f(x,t)=\sup_{x\in Q,\,l(Q)\geq t}\frac{1}{|Q|}\int_{Q}|f(x)|dx \qquad x\in\mathbb{R}^{n}, \, t \geq0 \] are ...
    • Isotropic Bipolaron-Fermion-Exchange Theory and Unconventional Pairing in Cuprate Superconductors 

      Bru J.-B.; de Siqueira Pedra W.; de Pasquale A.D. (2017-05-03)
      The discovery of high-temperature superconductors in 1986 represented a major experimental breakthrough (Nobel Prize 1987), but their theoretical explanation is still a subject of much debate. These materials have many ...
    • Logarithmic connections on principal bundles over a Riemann surface 

      Biswas I.; Dan A.; Paul A.; Saha A. (arxiv, 2017)
      Let $E_G$ be a holomorphic principal $G$--bundle on a compact connected Riemann surface $X$, where $G$ is a connected reductive complex affine algebraic group. Fix a finite subset $D\, \subset\, X$, and for each $x\,\in\, ...
    • Sparse domination theorem for multilinear singular integral operators with $L^{r}$-Hörmander condition 

      Li K. (Michigan Mathematical Journal, 2017-04-01)
      In this note, we show that if $T$ is a multilinear singular integral operator associated with a kernel satisfies the so-called multilinear $L^{r}$-Hörmander condition, then $T$ can be dominated by multilinear sparse operators.
    • Reexamination of continuous fuzzy measurement on two-level systems 

      Sokolovski D.; Rusconi S.; Brouard S.; Akhmatskaya E. (PHYSICAL REVIEW A, 2017-04-10)
      Imposing restrictions on the Feynman paths of the monitored system has in the past been proposed as a universal model-free approach to continuous quantum measurements. Here we revisit this proposition and demonstrate that ...
    • Criterion for logarithmic connections with prescribed residues 

      Biswas I.; Dan A.; Paul A. (Manucripta Mathematica, 2017-04-01)
      A theorem of Weil and Atiyah says that a holomorphic vector bundle $E$ on a compact Riemann surface $X$ admits a holomorphic connection if and only if the degree of every direct summand of $E$ is zero. Fix a finite subset ...
    • A Short Survey on the Integral Identity Conjecture and Theories of Motivic Integration 

      Thuong L.Q. (Acta Mathematica Vietnamica, 2017-04-04)
      In Kontsevich-Soibelman’s theory of motivic Donaldson-Thomas invariants for 3-dimensional noncommutative Calabi-Yau varieties, the integral identity conjecture plays a crucial role as it involves the existence of these ...
    • Modelling spatial trends in sorghum breeding field trials using a two-dimensional P-spline mixed model 

      Velazco J.G.; Rodríguez-Álvarez M.X.; Boer M.P.; Jordan D.R.; Eilers P.H.C.; Malosetti M.; van Eeuwijk F. (Theoretical and Applied Genetics, 2017-04-03)
      Adjustment for spatial trends in plant breeding field trials is essential for efficient evaluation and selection of genotypes. Current mixed model methods of spatial analysis are based on a multi-step modelling process ...
    • Comparison of two discrimination indexes in the categorisation of continuous predictors in time-to-event studies 

      Barrio I.; Rodríguez-Álvarez M.X.; Meira-Machado L.; Esteban C.; Arostegui I. (SORT (Statistics and Operations Research Transactions), 2017-04)
      The Cox proportional hazards model is the most widely used survival prediction model for analysing timeto-event data. To measure the discrimination ability of a survival model the concordance probability index is widely ...
    • A characterization of two weight norm inequality for Littlewood-Paley $g_{\lambda}^{*}$-function 

      Cao M.; Li K.; Xue Q. (Journal of Geometric Analysis, 2017)
      Let $n\ge 2$ and $g_{\lambda}^{*}$ be the well-known high dimensional Littlewood-Paley function which was defined and studied by E. M. Stein, $$g_{\lambda}^{*}(f)(x)=\bigg(\iint_{\mathbb R^{n+1}_{+}} \Big(\frac{t}{t+|x-y ...
    • An investigation of clustering strategies in many-objective optimization: the I-Multi algorithm as a case study 

      Castro O.R.; Pozo A.; Lozano J.A.; Santana R. (Swarm Intelligence, 2017-03-30)
      A variety of general strategies have been applied to enhance the performance of multi-objective optimization algorithms for many-objective optimization problems (those with more than three objectives). One of these strategies ...
    • The JBEI quantitative metabolic modeling library (jQMM): a python library for modeling microbial metabolism 

      Birkel G.W.; Ghosh A.; Kumar V.S.; Weaver D.; Ando D.; Backman T.W.H.; Arkin A.P.; Keasling J.D.; García Martín H. (BMC Bioinformatics, 2017-01-01)
      Modeling of microbial metabolism is a topic of growing importance in biotechnology. Mathematical modeling helps provide a mechanistic understanding for the studied process, separating the main drivers from the circumstantial ...
    • Quantitative weighted estimates for rough homogeneous singular integrals 

      Hytönen T. P.; Roncal L.; Tapiola O. (Israel Journal of Mathematics, 2017-03-11)
      We consider homogeneous singular kernels, whose angular part is bounded, but need not have any continuity. For the norm of the corresponding singular integral operators on the weighted space $L^2(w)$, we obtain a bound ...
    • Fusion-based variational image dehazing 

      Galdran A.; Vazquez-Corral J.; Pardo D.; Bertalmio M. (IEEE Signal Processing Letters, 2017-02-01)
      We propose a novel image-dehazing technique based on the minimization of two energy functionals and a fusion scheme to combine the output of both optimizations. The proposed fusion-based variational image-dehazing (FVID) ...
    • The Calderón problem with corrupted data 

      Caro P.; García A. (Inverse Problems, 2017-01)
      We consider the inverse Calderón problem consisting of determining the conductivity inside a medium by electrical measurements on its surface. Ideally, these measurements determine the Dirichlet-to-Neumann map and, therefore, ...
    • Inverse scattering for a random potential 

      Caro P.; Helin T.; Lassas M. (2016-05)
      In this paper we consider an inverse problem for the $n$-dimensional random Schrödinger equation $(\Delta-q+k^2)u = 0$. We study the scattering of plane waves in the presence of a potential $q$ which is assumed to be a ...
    • Global Uniqueness for The Calderón Problem with Lipschitz Conductivities 

      Caro P.; Rogers K.M. (Forum of Mathematics, Pi, 2016-01-01)
      We prove uniqueness for the Calderón problem with Lipschitz conductivities in higher dimensions. Combined with the recent work of Haberman, who treated the three- and four-dimensional cases, this confirms a conjecture of ...
    • Uniqueness properties for discrete equations and Carleman estimates 

      Fernández Bertolin A.; Vega L. (Journal of Functional Analysis, 2017-03-25)
      Using Carleman estimates, we give a lower bound for solutions to the discrete Schrödinger equation in both dynamic and stationary settings that allows us to prove uniqueness results, under some assumptions on the decay of ...