Browsing Institutt for matematiske fag by Title
Now showing items 1791-1810 of 2397
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Reducibility of parameter ideals in low powers of the maximal ideal
(Peer reviewed; Journal article, 2021)A commutative noetherian local ring (R, m) is Gorenstein if and only if every parameter ideal of R is irreducible. Although irreducible parameter ideals may exist in non-Gorenstein rings, Marley, Rogers, and Sakurai show ... -
Reduction of Dimensionality in Spatiotemporal Models
(Doctoral Theses at NTNU, 1503-8181; 2010:193, Doctoral thesis, 2010) -
A refinement of Gorenstein flat dimension via the flat--cotorsion theory
(Peer reviewed; Journal article, 2021)We introduce a refinement of the Gorenstein flat dimension for complexes over an associative ring—the Gorenstein flat-cotorsion dimension—and prove that it, unlike the Gorenstein flat dimension, behaves as one expects of ... -
Refining the Internet Voting Protocol
(Master thesis, 2011)We make two improvements to the Internet voting protocol written by Gjøsteen. The first improvement improves the performance of the protocol, by changing the encryption of the votes. The second improvement improves the ... -
Regularity for an anisotropic equation in the plane
(Journal article, 2018)We present a simple proof of the C1 regularity of p-anisotropic functions in the plane for 2≤p <∞. We achieve a logarithmic modulus of continuity for the derivatives.The monotonicity (in the sense of Lebesgue) of the ... -
Regularity of solutions of the parabolic normalized p-Laplace equation
(Journal article; Peer reviewed, 2018)The parabolic normalized p-Laplace equation is studied. We prove that a viscosity solution has a time derivative in the sense of Sobolev belonging locally to L2. -
Regularity of the p-Poissson Equation in the Plane
(Journal article; Peer reviewed, 2017)We study the regularity of the p-Poisson equation Δpu=h,h∈Lq, Δpu=h,h∈Lq, in the plane. In the case p > 2 and 2 < q < ∞, we obtain the sharp Hölder exponent for the gradient. In the other cases, we come arbitrarily close ... -
Regularity results for the Dirac-Klein-Gordon equations
(Doktoravhandlinger ved NTNU, 1503-8181, Doctoral thesis, 2009) -
A Regularized System for the Nonlinear Variational Wave Equation
(Doctoral theses at NTNU;2021:21, Doctoral thesis, 2021) -
A regularized system for the nonlinear variational wave equation
(Peer reviewed; Journal article, 2023)We present a new generalization of the nonlinear variational wave equation. We prove existence of local, smooth solutions for this system. As a limiting case, we recover the nonlinear variational wave equation. -
Rekursiv blokkoppdatering av Isingmodellen
(Master thesis, 2006)I denne rapporten sammenligner vi tre varianter av Markov Chain Monte Carlo (MCMC) - simulering av Isingmodellen. Vi sammenligner enkeltnode-oppdatering, naiv blokkoppdatering og rekursiv blokkoppdatering. Vi begynner med ... -
Relating abelian categories to triangulated categories using generalized cluster tilting methods
(Doctoral thesis at NTNU;2016:75, Doctoral thesis, 2016) -
Relations between infinitesimal non-commutative cumulants
(Journal article; Peer reviewed, 2021)Boolean, free and monotone cumulants as well as relations among them, have proven to be important in the study of non-commutative probability theory. Quite notably, Boolean cumulants were successfully used to study free ... -
Relative Variable Importance Approaches for Linear Models with Random Intercepts
(Master thesis, 2022)Å tolke lineære regresjonsmodeller er et vanlig ønske innen forskning. Et vanlig spørsmål forskere er interessert i er hvor viktig en prediktor er for modellen. Å vite den individuelle betydningen av hver prediktor kan ... -
Relative variable importance: A comparison between R^2 decomposition and variable importance in machine learning
(Master thesis, 2021)I en regresjonsanalyse er vi ofte interessert i hvilke parametere som har størst påvirkning på responsvariabelen. Selv om det er gjort mye forskning på dette området når det kommer til lineære regresjonsmodeller, er det ... -
Relaxation Systems with Applications to Two-Phase Flow
(Master thesis, 2014)Relaxation systems are widely studied and much used to describe nonequilibrium phenomena, occurring in, for example, two-phase flow. In this thesis we will therefore consider relaxation systems in one space dimension and ... -
Reliability Analysis of Fire Water Systems on Offshore Installations
(Master thesis, 2009)The background for this thesis is a change in the guidelines provided by the Norwegian petroleum industry regarding design of active and passive fire protection at offshore platforms. Now, it is possible to take into account ... -
Reliability Analysis of Fire Water Systems on Offshore Installations
(Master thesis, 2009) -
Reliability of Technical Systems Estimated by Enhanced Monte Carlo Simulation
(Journal article; Peer reviewed, 2018)Computation of the reliability of large technical systems is usually a very difficult problem for realistic systems, and it is generally not possible to calculate the exact reliability. There are many techniques for ... -
Reliability testing based on deterioration measurements
(Dr.ingeniøravhandling, 0809-103X; 1988:32, Doctoral thesis, 1988)In traditional reliability life testing and accelerated life testing, usally only the failure mode and the lifetime upon failure or censoring, are recorded. The information obtained from such testing may be signicantly ...