Browsing Matematisk institutt by Title
Now showing items 27-46 of 3771
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2024)We construct conforming finite element elasticity complexes on the Alfeld splits of tetrahedra. The complex consists of vector fields and symmetric tensor fields, interlinked via the linearized deformation operator, the ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)Abstract. We introduce an improved formulation of the double-multiple streamtube (DMST) model for the prediction of the flow quantities of vertical axis wind turbines (VAWT). The improvement of the new formulation lies in ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2019)This paper studies a duopoly investment model with uncertainty. There are two alternative irreversible investments. The first firm to invest gets a monopoly benefit for a specified period of time. The second firm to invest ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)We propose in this paper New Q-Newton’s method. The update rule is conceptually very simple, using the projections to the vector subspaces generated by eigenvectors of positive (correspondingly negative) eigenvalues of the ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)We prove two results on the tube algebras of rigid C*-tensor categories. The first is that the tube algebra of the representation category of a compact quantum group G is a full corner of the Drinfeld double of G. As an ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2019)This work introduces a general concept of center for graphs, built on the model of the characteristic set ([12], [14]) of trees. We define it as the set of cycles in a specific directed graph associated with the original ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)We study a financial market where the risky asset is modelled by a geometric Itô-Lévy process, with a singular drift term. This can for example model a situation where the asset price is partially controlled by a company ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)We present a fully coupled pore-network/free-flow model providing pore-scale insight into drying processes. We solve the Navier–Stokes equations with component transport in the free-flow region, coupled to a dynamic ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2023)In this paper we describe a generic spectral Petrov–Galerkin method that is sparse and strictly banded for any linear ordinary differential equation with polynomial coefficients. The method applies to all subdivisions of ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)This paper presents a new efficient algorithm based on the spectral-Galerkin numerical approximations complemented by a magnetohydrodynamics–Boussinesq model and a new solver for studying the development of a Rayleigh–Taylor ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)We define a new Gromov–Witten theory relative to simple normal crossing divisors as a limit of Gromov–Witten theory of multi-root stacks. Several structural properties are proved including relative quantum cohomology, ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2018)We prove a Grothendieck–Lefschetz theorem for equivariant Picard groups of non-singular varieties with finite group actions.
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)This paper incorporates the theory of Hochschild homology into our program on log motives. We discuss a geometric definition of logarithmic Hochschild homology of animated pre-log rings and construct an André-Quillen type ...
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(Journal article / Tidsskriftartikkel / SubmittedVersion, 2013)The aim of this paper is to introduce a new numerical algorithm for solving the continuous time nonlinear filtering problem. In particular, we present a particle filter that combines the Kusuoka–Lyons–Victoir (KLV) cubature ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2024)
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)Abstract We establish a local theory, i.e., existence, uniqueness and blow-up criterion, for a general family of singular SDEs in Hilbert spaces. The key requirement relies on an approximation property that allows us to ...
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(Chapter / Bokkapittel / PublishedVersion; Peer reviewed, 2022)The threshold theorem is a fundamental result in the theory of fault-tolerant quantum computation stating that arbitrarily long quantum computations can be performed with a polylogarithmic overhead provided the noise level ...
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(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 2021)We introduce a mean counting function for Dirichlet series, which plays the same role in the function theory of Hardy spaces of Dirichlet series as the Nevanlinna counting function does in the classical theory. The existence ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2023)Circulating vitamin B12 concentrations during pregnancy are associated with offspring health. Foetal DNA methylation changes could underlie these associations. Within the Pregnancy And Childhood Epigenetics Consortium, we ...
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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2022)In railways, the long-term strategic planning is the process of evaluating improvements to the railway network (e.g., upgrading a single track line to a double track line) and changes to the composition/frequency of train ...