Browsing Institutt for matematiske fag by Title
Now showing items 835-854 of 2434
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Flow equivalence and orbit equivalence for shifts of finite type and isomorphism of their groupoids
(Journal article; Peer reviewed, 2018)We give conditions for when continuous orbit equivalence of one-sided shift spaces implies flow equivalence of the associated two-sided shift spaces. Using groupoid techniques, we prove that this is always the case for ... -
Flow-times in an M/G/1 Queue under a Combined Preemptive/Non-preemptive Priority Discipline.: Scheduled Waiting Time on Single Track Railway Lines
(Master thesis, 2010)A priority based rule for use during the process of scheduling trains oper- ating on a single track railway line was proposed by the Norwegian railway operator and owner, Jernbaneverket. The purpose of this study is to ... -
Follow-the-leader models can be viewed as a numerical approximation to the Lighthill-Whitham-Richards model for traffic flow
(Journal article; Peer reviewed, 2018) -
A footnote to a theorem Halász
(Journal article; Peer reviewed, 2020)We study multiplicative functions f satisfying |f(n)|≤1 for all n, the associated Dirichlet series F(s):=∑∞n=1f(n)n−s, and the summatory function Sf(x):=∑n≤xf(n). Up to a possible trivial contribution from the numbers ... -
Forecast Uncertainty for Univariate Time Series Using Generative Adversarial Networks
(Master thesis, 2020)Når man skal predikere fremtidige verdier av en tidsrekke er usikkerheten i prediksjonene en viktig faktor. Nylig har konkurranser innen tidsrekke-prediksjon vist at nevrale nettverk presterer svært godt, men usikkerhetsmålet ... -
Forecasting Child Mortality while Accounting for Complex Survey Design
(Master thesis, 2019)Barnedødelighetsrater er viktige indikatorer på en nasjons helse. FNs tusenårsmål (MDG) og bærekraftsmål (SDG) fokuserer på å redusere barnedødelighet. Man trenger nøyaktige estimater og prediksjoner for nyfødtdødelighet ... -
Forecasting Day-Ahead Electricity Spot Prices, With Applications to the German Electricity Market
(Master thesis, 2019)Denne masteroppgaven har studert det tyske elektrisitetsmarkedet, i den hensikt å predikere neste dags elektrisitetsspotpriser. Tre modeller er presentert; den første modellen er en "persistence"-modell, som fungerer som ... -
Forecasting Red Wine Rankings at Vinmonopolet with Machine Learning
(Master thesis, 2021)I Norge blir salg av drikkevarer med over 4,75 % alkohol monopolisert av Vinmonopolet og kontrollert av strenge lover som forbyr reklame. Vinmonopolet bytter produktutvalg annenhver måned, der de lanserer nye produkter og ... -
Forecasting the Total Balance Sent to Debt Collection
(Master thesis, 2019)Kredittkort har lenge vært en populær betalingsmetode og bruken vokser globalt. Kred- ittkortselskaper må stadig vurdere risikoen forbundet med pengeutlåning og en måte å måle risiko i forbindelse med kredittkortutgifter ... -
Forecasting Univariate Time Series with Missing Data
(Master thesis, 2021)Manglande data er ikkje-observerte verdiar for ein variabel, og er ofte å finne i tidsrekkjer frå den verkelege verda. Ved å lage modellar som beskriv tidsrekkjer kan ein lage estimat på framtidige verdiar av det tidsrekkja ... -
Formal verification of the Norwegian Internet Voting Protocol
(Master thesis, 2018)In this paper we look at the formalization and verification of several security components of the cryptosystem underlying The Norwegian Internet Voting Protocol. The focus will be on vote submission and B-Integrity. -
Formality and strong Massey vanishing for real projective groups
(Peer reviewed; Journal article, 2023)This report presents a general panorama of recent progress in the arithmetic-geometry theory of Galois and homotopy groups and its ramifications. While still relying on Grothendieck’s original pillars [1], the present ... -
Formation of singularities of spherically symmetric solutions to the 3D compressible Euler equations and Euler–Poisson equations
(Journal article; Peer reviewed, 2018)By introducing a new averaged quantity with a fast decay weight to perform Sideris's argument (Commun Math Phys, 1985) developed for the Euler Equations, we extend the formation of singularities of classical solution to ... -
Formative assessment as a future step in maintaining the mastery-approach and performance-avoidance goal stability.
(Journal article; Peer reviewed, 2018)The study presented in this article examines which achievement-goal pattern students pursue in a formative assessment practice that facilitates mastery and learning opportunities. An explanatory mixed-method design with ... -
Fourier Interpolation and Time-Frequency Localization
(Peer reviewed; Journal article, 2021)We prove that under very mild conditions for any interpolation formula f(x)=∑λ∈Λf(λ)aλ(x)+∑μ∈Mf^(μ)bμ(x) we have a lower bound for the counting functions nΛ(R1)+nM(R2)≥4R1R2−Clog2(4R1R2) which very closely matches recent ... -
Fourier Interpolation with Zeros of Zeta and L-Functions
(Peer reviewed; Journal article, 2022)We construct a large family of Fourier interpolation bases for functions analytic in a strip symmetric about the real line. Interesting examples involve the nontrivial zeros of the Riemann zeta function and other L-functions. ... -
Fourier optimization and quadratic forms
(Peer reviewed; Journal article, 2021)We prove several results about integers represented by positive definite quadratic forms, using a Fourier analysis approach. In particular, for an integer ℓ≥1, we improve the error term in the partial sums of the number ... -
Fourier series and Hilbert spaces
(Bachelor thesis, 2022)Denne bacheloroppgaven gir en oversikt over konvergensen av Fourier-serier og dens anvendelse i Hilbert-rom sammen med to kjerner, Dirichlet-kjernen og Fejér-kjernen. Nødvendige teoremer som konvergenssetningen, Bessels ... -
Fourierhyperfunksjoner
(Master thesis, 2008)Oppgaven handler om fouriertransformasjon av generaliserte funksjoner, med spesiell vekt på fouriertransformasjon av hyperfunksjoner. Transformasjonen på hyperfunksjoner er deretter sammenlignet med Carlemans fouriertransform, ...