Browsing Department of Mathematics by Title
Now showing items 520-539 of 932
-
Non-Slit Solutions to the Loewner Equation
(Master thesis, 2010-04-30)We study conditions on the driving term of the Loewner equation which guarantee that the equation generates slits. We construct a new family of examples of non-slit solutions which generalize Kufarev's example, in which ... -
Non-standard shocks in the Buckley-Leverett equation
(Peer reviewed; Journal article, 2015-08)It is shown how delta shock waves which consist of Dirac delta distributions and classical shocks can be used to construct non-monotone solutions of the Buckley–Leverett equation. These solutions are interpreted using a ... -
Nonemptiness of severi varieties on enriques surfaces
(Journal article; Peer reviewed, 2023)Let (S,L) be a general polarised Enriques surface, with L not numerically 2-divisible. We prove the existence of regular components of all Severi varieties of irreducible nodal curves in the linear system |L| , that is, ... -
Nonholonomic geometry on finite and infinite dimensional Lie groups and rolling manifolds
(Doctoral thesis, 2012-03-30)Part I: We start by giving some background on the topics discussed in this thesis. The main topic of the thesis is nonholonomic geometry. In Chapter 1 we give an introduction of nonholonomic geometry in the context of ... -
Nonhydrostatic pressure in ocean models with focus on wind driven internal waves
(Doctoral thesis, 2010-02-05) -
Nonlinear cross-spectrum analysis via the local Gaussian correlation
(Journal article, 2017)Spectrum analysis can detect frequency related structures in a time series \(\{Y_t\}_{t\in\mathbb{Z}}\), but may in general be an inadequate tool if asymmetries or other nonlinear phenomena are present. This limitation is ... -
Nonlinear Effects During Transient Fluid Flow in Reservoirs as Encountered in Well-Test Analysis
(Department of Applied Mathematics report, Research report, 1985-03) -
Nonlinear equations of acoustics in inhomogeneous, thermoviscous fluids
(Department of Applied Mathematics report, Research report, 1991-03) -
A Nonlinear Formulation of Radiation Stress and Applications to Cnoidal Shoaling
(Journal article; Peer reviewed, 2021)In this article, we provide formulations of energy flux and radiation stress consistent with the scaling regime of the Korteweg–de Vries (KdV) equation. These quantities can be used to describe the shoaling of cnoidal waves ... -
A nonlinear multi-scale model for blood circulation in a realistic vascular system
(Journal article; Peer reviewed, 2021)In the last decade, numerical models have become an increasingly important tool in biological and medical science. Numerical simulations contribute to a deeper understanding of physiology and are a powerful tool for better ... -
Nonlinear propagation and interaction of collinear sound beams
(Department of Applied Mathematics report, Research report, 1989-10) -
Nonlinear spectral analysis via the local Gaussian correlation
(Journal article, 2017)The spectral distribution \(f(\omega)\) of a stationary time series \(\{Y_t\}_{t\in\mathbb{Z}}\) can be used to investigate whether or not periodic structures are present in \(\{Y_t\}_{t\in\mathbb{Z}}\), but \(f(\omega)\) ... -
Nonlinear Spectral Analysis: A Local Gaussian Approach
(Journal article; Peer reviewed, 2022)The spectral distribution f(ω) of a stationary time series {Yt}t∈Z can be used to investigate whether or not periodic structures are present in {Yt}t∈Z, but f(ω) has some limitations due to its dependence on the autocovariances ... -
Nonlinear Spectrum Analysis based on the Local Gaussian Correlation and Model Selection for Copulas
(Doctoral thesis, 2017-11-20) -
The Norwegian Stock Market: - A Local Gaussian Perspective
(Master thesis, 2013-06-03)In this thesis, using daily returns from 18 stocks, oil price, exchange rates and the main index of the Oslo Stock Exchange over a period of 5 years, we investigate how the Local Gaussian Correlation can be used to describe ... -
A note on Front tracking and the Equivalence between Viscosity Solutions of Hamilton-Jacobi Equations And Entropy Solutions of scalar Conservation Laws.
(Department of Applied Mathematics report, Research report, 2000-01) -
A Note on Portfolio Management under non-Gaussian Logreturns
(Department of Applied Mathematics report, Research report, 2000-02) -
A Note on Portfolio oprimization in a levy Market with local Substitution and habit formation
(Department of Applied Mathematics report, Research report, 2000-05) -
A note on Severi varieties of nodal curves on Enriques surfaces
(Journal article; Peer reviewed, 2020)Let |L| be a linear system on a smooth complex Enriques surface S whose general member is a smooth and irreducible curve of genus p, with L2 > 0, and let V|L|,δ(S) be the Severi variety of irreducible δ-nodal curves in ... -
A Note on the Stability of Steady Inviscid Helical Gas Flows
(Department of Applied Mathematics report, Research report, 1976-01)