Blar i Institutt for matematiske fag på tittel
Viser treff 1547-1566 av 2359
-
∞-Operads as Analytic Monads
(Peer reviewed; Journal article, 2022) -
∞-operads as symmetric monoidal ∞-categories
(Journal article; Peer reviewed, 2024) -
∞ -Operads via symmetric sequences
(Peer reviewed; Journal article, 2021)We construct a generalization of the Day convolution tensor product of presheaves that works for certain double \infty -categories. Using this construction, we obtain an \infty -categorical version of the well-known ... -
Operator algebras on Wiener amalgam spaces
(Master thesis, 2022)I denne oppgåva vert operatoralgebraar på Wiener-amalgamrom introdusert og behandla. Først kjem ei grundig innføring til Wiener-amalgamrom på lokalt kompakte grupper, som dreg nytte av både den kontinuerlege og diskrete ... -
Operator splitting for the Benjamin-Ono equation
(Journal article; Peer reviewed, 2015)In this paper we analyze operator splitting for the Benjamin–Ono equation, ut=uux+Huxx, where H denotes the Hilbert transform. If the initial data are sufficiently regular, we show the convergence of both Godunov and Strang ... -
Operator theory in spaces of Dirichlet series
(Doctoral theses at NTNU;2017:193, Doctoral thesis, 2017) -
Opportunities for language enhancement in a learning environment designed on the basis of the theory of didactical situations
(Peer reviewed; Journal article, 2020)This paper is based on data from two teaching sequences in primary school that are designed using principles from the theory of didactical situations (TDS). The following research question is addressed: “What opportunities ... -
Optimal Control of a Semi-Linear Parabolic System Related to Sustainable Marine Fishery
(Master thesis, 2020)Overfiske er et økende problem, og truer mange fiskebestander i verden. In denne masteroppgaven forsøker vi å finne bærekraftige fiskestrategier ved å løse et ikke-konvekst optimalt kontrollproblem. Vi begynner med å ... -
Optimal Control of Multibody Dynamics with Applications
(Master thesis, 2023)Vi presenterer en metode for å representere bjelker ved hjelp av flerkroppsdynamikk, nærmere bestemt et system av stive ledd som kalles en pendelkjede. Ved å innføre ledd i uttrykket som straffer vinkler mellom påfølgende ... -
Optimal control of multiphase steel production
(Journal article; Peer reviewed, 2019)An optimal control problem for the production of multiphase steel is investigated that takes into account phase transformations in the steel slab. The state equations are a semilinear heat equation coupled with an ordinary ... -
Optimal non-linear solvers - Applications in reservoir simulation
(Master thesis, 2014)This thesis starts by giving a general introduction to hydrocarbon reservoirs, before physical relations and mathematical tools used to model the flow of the fluid components in the porous media are presented. The resulting ... -
Optimal Quadrature for univariate and tensor product splines
(Journal article; Peer reviewed, 2016)Numerical integration is a core subroutine in many engineering applications, including the finite element method (FEM). Isogeometric analysis is a FEM technology that uses smooth B-spline and NURBS basis functions. ... -
Optimal recovery of a radiating source with multiple frequencies along one line
(Peer reviewed; Journal article, 2020)We study an inverse problem where an unknown radiating source is observed with collimated detectors along a single line and the medium has a known attenuation. The research is motivated by applications in SPECT and beam ... -
Optimal reparametrization of curves in shape analysis by introducing a deep neural network architecture
(Master thesis, 2021)Former er typisk beskrecet som det som er igjen av et objekt uten å ta hensyn til plassering, rotasjon og størrelse. En stor del av formanalyse består av å definere likheter og forskjeller mellom formene for å utføre ulike ... -
Optimal shapes for tree roots
(Journal article, 2022)The paper studies a class of variational problems, modeling optimal shapes for tree roots. Given a measure μ describing the distribution of root hair cells, we seek to maximize a harvest functional H , computing the ... -
Optimal small data scattering for the generalized derivative nonlinear Schrödinger equations
(Peer reviewed; Journal article, 2020)In this work, we consider the following generalized derivative nonlinear Schr\"odinger equation \begin{align*} i\partial_t u+\partial_{xx} u +i |u|^{2\sigma}\partial_x u=0, \quad (t,x)\in \R\times \R. \end{align*} We prove ... -
Optimal-order isogeometric analysis and isogeometric collocation at Galerkin superconvergent points
(Master thesis, 2016)Isogeometric analysis with full quadrature yields optimal convergence rates but require higher computational cost than necessary for splines of maximal continuity. In this thesis two such methods, the weak variational ... -
Optimality for the two-parameter quadratic sieve
(Peer reviewed; Journal article, 2022)We study the two-parameter quadratic sieve for an arbitrary smoothing function. We prove, under some very general assumptions, that the function considered by Barban and Vekhov (1968) and Graham (1978) for this problem is ... -
Optimization Analysis of Risk/Return of Large Equity Portfolios, Applying Option Strategies
(Master thesis, 2008)This is a study of the risk/return characteristics of large equity portfolios, consisting of different option contracts. In times when there is nervousness present in the financial market, and the future prospects of the ... -
Optimizing Predictive Performance of Random Forests by means of Design of Experiments and Resampling, with a Case-study in Credit Scoring
(Master thesis, 2020)Kredittinstitusjoner bruker kredittscoringsmodeller til å avgjøre hvilke kredittkortsøknader som skal innvilges. Prestasjonen til statistiske- eller maskinlæringsmodeller brukt i kredittscoring avhenger av verdiene til ...