Blar i Institutt for matematiske fag på tittel
Viser treff 1567-1586 av 2359
-
Order conditions for stochastic Runge–Kutta methods preserving quadratic invariants of Stratonovich SDEs
(Journal article; Peer reviewed, 2017)In this paper we prove that for a stochastic Runge–Kutta method, the conditions for preserving quadratic invariants work as simplifying assumptions. For such methods, the method coefficients only have to satisfy one condition ... -
Ordered invariant ideals of Fourier-Stieltjes algebras
(Journal article; Peer reviewed, 2018)For a locally compact group G, every G-invariant subspace E of the Fourier-Stieltjes algebra B(G) gives rise to the following two ideals of the group C ∗ -algebra C ∗ (G): the intersection of the kernels of the representations ... -
Orthogonal decomposition of composition operators on the $H^2$ space of Dirichlet series
(Peer reviewed; Journal article, 2022)Let denote the Hilbert space of Dirichlet series with square-summable coefficients. We study composition operators on which are generated by symbols of the form , in the case that . If only a subset of prime numbers ... -
Overestimation of volatility in schizophrenia and autism? A comparative study using a probabilistic reasoning task
(Peer reviewed; Journal article, 2021)Background and objectives A plethora of studies has investigated and compared social cognition in autism and schizophrenia ever since both conditions were first described in conjunction more than a century ago. Recent ... -
Overføring av læring fra matematikk til fysikk ved forkurs for ingeniørutdanning
(Peer reviewed; Journal article, 2023)Å ta i bruk matematiske kunnskaper er viktig i mange sammenhenger i fysikk. Samtidig viser det seg at overføring av læring fra matematikk til fysikk er utfordrende for studenter. Dette gjør at studenter ikke klarer å løse ... -
Overganger mellom matematiske representasjoner: En studie om hvordan 1T-elever gjennomfører overgangen fra situasjon til grafiske og algebraiske representasjoner av polynomer.
(Master thesis, 2014)Denne studien bygger på et sosiokulturelt læringssyn. Fokuset for studien har ligget på hvordan 1T-elever gjennomfører overgangen fra situasjon, som er beskrevet ved naturlig språk, til algebraiske og grafiske representasjoner ... -
Overgangsprosessen mellom representasjoner for funksjoner - En studie vedrørende feil i overgangsprosessen mellom representasjonene graf, funksjonsuttrykk og tabell
(Master thesis, 2018)Formålet med denne masteroppgaven er å avdekke hvilke overgangsfeil elever muligens begår i overgangsprosessen mellom representasjonene graf, funksjonsuttrykk og tabell. Videre undersøkes hva som skjer i overgangsprosessen ... -
PAH og PCB i byjord fra Dublin: Kilder og forurensningsstatus
(Master thesis, 2010)I denne oppgaven ble det samlet inn 196 prøver av byjord fra Dublin. Spredningen av prøvenes lokaliteter ble lagt slik at den skulle gi et bilde av hele Dublin og dens forsteder, med et hovedfokus på sentrum. Prøvene ble ... -
Pair Correlation estimates for the zeros of the zeta function via semidefinite programming
(Peer reviewed; Journal article, 2020)In this paper we study the distribution of the non-trivial zeros of the Riemann zeta-function ζ(s) (and other L-functions) using Montgomery's pair correlation approach. We use semidefinite programming to improve upon ... -
Paper-based electronic voting
(Master thesis, 2015)In this thesis, we present two paper-based electronic voting systems Prêt-à-Voter and Demos. We describe these in the same systematic way with new examples. Furthermore, we implement RSA cryptosystem in Prêt-à-Voter. Then, ... -
Paper-based electronic voting
(Master thesis, 2015)In this thesis, we present two paper-based electronic voting systems Prêt-à-Voter and Demos. We describe these in the same systematic way with new examples. Furthermore, we implement RSA cryptosystem in Prêt-à-Voter. Then, ... -
Parallel Multiple Proposal MCMC Algorithms
(Master thesis, 2007)We explore the variance reduction achievable through parallel implementation of multi-proposal MCMC algorithms and use of control variates. Implemented sequentially multi-proposal MCMC algorithms are of limited value, but ... -
Parallel Solutions of Stochastic Differential Equations
(Master thesis, 2015)The main purpose of this work was to develop a more time efficient solution to the Lotka- Volterra model. To compare runtimes, in addition to the serial version, the algorithm was implemented using the Message Passing ... -
Parallelization of some scientific codes using profiling tools and OpenMP
(Research report, 2009)The purpose of this report is to exchange our experience with parallelizing existing scientific codes by utilizing profiling tools and the OpenMP application programming interface (API) for multi-platform shared-memory ... -
Parameter estimation in a Markov mesh model by reversible jump MCMC simulation
(Master thesis, 2012)We have a model for simulating facies values in a rock. We can use the model to find facies structures in a 2-dimensional area, which we can use to find properties of a rock in a petroleum reservoir. The model is a Markov ... -
Parameter estimation in convolved categorical models
(Master thesis, 2010)In this thesis, we solve the seismic inverse problem in a Bayesian setting and perform the associated model parameter estimation. The subsurface rock layers are represented by categorical variables, which depends on some ... -
Parameter Estimation in Extreme Value Models with Markov Chain Monte Carlo Methods
(Master thesis, 2010)In this thesis I have studied how to estimate parameters in an extreme value model with Markov Chain Monte Carlo (MCMC) given a data set. This is done with synthetic Gaussian time series generated by spectral densities, ... -
Parameter selection for total variation regularization with applications in imaging
(Master thesis, 2020)Regulariseringsmetoder er ofte brukt for å løse inverse problemer. Spesielt har total variasjon- regulering vist seg å være effektiv for støyfjerning av bilder. Regulariseringsmetoder kr- ever vanligvis valg av én eller ... -
Parameter selection methods for variational image restoration
(Master thesis, 2021)Vi undersøker diskrepansprinsippet og ein L-hyperflate-metode som automatiserte parametervalmetodar i støyfjerningsproblem for bilete. Å velje optimale regulariseringsparametrar er alltid utfordrande, og utfordringa er ... -
Parametric spatial covariance models in the ensemble Kalman filter
(Peer reviewed; Journal article, 2019)Several applications rely on data assimilation methods for complex spatio-temporal problems. The focus of this paper is on ensemble-based methods, where some approaches require estimation of covariances between state ...