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Cover Image for A Scattering Theory for Linear Waves on the Interior of Reissner–Nordström Black Holes View Article
A Scattering Theory for Linear Waves on the Interior of Reissner–Nordström Black Holes
Christoph Kehle, Yakov Shlapentokh-Rothman
Feb 08, 2019
We develop a scattering theory for the linear wave equation □ψ=0 on the interior of Reissner-Nordström black holes, connecting the fixed frequency picture to the physical space picture. Our main result gives the existence...
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Cover Image for Quasinormal Modes in Extremal Reissner–Nordström Spacetimes View Article
Quasinormal Modes in Extremal Reissner–Nordström Spacetimes
Dejan Gajic, Claude Warnick
Jul 28, 2021
Abstract: We present a new framework for characterizing quasinormal modes (QNMs) or resonant states for the wave equation on asymptotically flat spacetimes, applied to the setting of extremal Reissner–Nordström black holes. We...
article
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Cover Image for Uniform Boundedness and Continuity at the Cauchy Horizon for Linear Waves on Reissner–Nordström–AdS Black Holes View Article
Uniform Boundedness and Continuity at the Cauchy Horizon for Linear Waves on Reissner–Nordström–AdS Black Holes
Christoph Kehle
Jul 25, 2019
Motivated by the Strong Cosmic Censorship Conjecture for asymptotically Anti-de Sitter (AdS) spacetimes, we initiate the study of massive scalar waves satisfying □gψ-μψ=0 on the interior of AdS black holes. We prescribe initial...
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Cover Image for Uniform Boundedness and Continuity at the Cauchy Horizon for Linear Waves on Reissner–Nordström–AdS Black Holes View Article
Uniform Boundedness and Continuity at the Cauchy Horizon for Linear Waves on Reissner–Nordström–AdS Black Holes
Christoph Kehle
Jun 06, 2020
Abstract: Motivated by the Strong Cosmic Censorship Conjecture for asymptotically Anti-de Sitter (AdS) spacetimes, we initiate the study of massive scalar waves satisfying □gψ-μψ=0 on the interior of AdS black holes. We...
article
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Cover Image for Deformations of glued G<sub>2</sub>-manifolds View Article
Deformations of glued G<sub>2</sub>-manifolds
Johannes Nordström
Jul 01, 2009
We study how a gluing construction, which produces compact manifolds with holonomy G2 from matching pairs of asymptotically cylindrical G 2-manifolds, behaves under deformations. We show that the gluing construction defines a...
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Cover Image for Uniform Boundedness and Continuity at the Cauchy Horizon for Linear Waves on Reissner–Nordström–AdS Black Holes View Article
Uniform Boundedness and Continuity at the Cauchy Horizon for Linear Waves on Reissner–Nordström–AdS Black Holes
Christoph Kehle
Jul 29, 2020
Abstract: Motivated by the Strong Cosmic Censorship Conjecture for asymptotically Anti-de Sitter (AdS) spacetimes, we initiate the study of massive scalar waves satisfying □gψ-μψ=0 on the interior of AdS black holes. We...
article
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Cover Image for The association of depression with subsequent dementia diagnosis View Article
The association of depression with subsequent dementia diagnosis
Sofie Holmquist, Anna Nordström, Peter Nordström
Jan 09, 2020
BACKGROUND: Depression is associated with an increased risk of dementia. However, short follow-up times and lack of adjustment for familial factors in previous studies could influence this association. The purpose of the present...
Aged Cohort Studies Dementia Depression Female Follow-Up Studies Humans Male Middle Aged Sweden
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Cover Image for Deformations of glued G<sub>2</sub>-manifolds View Article
Deformations of glued G<sub>2</sub>-manifolds
Johannes Nordström
Jul 01, 2009
We study how a gluing construction, which produces compact manifolds with holonomy G2 from matching pairs of asymptotically cylindrical G 2-manifolds, behaves under deformations. We show that the gluing construction defines a...
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Cover Image for Asymptotically cylindrical Calabi-Yau manifolds View Article
Asymptotically cylindrical Calabi-Yau manifolds
Haskins Mark, Hans Joachim Hein, Nordström Johannes
Oct 31, 2015

Let M be a complete Ricci-flat Kähler manifold with one end and assume that this end converges at an exponential rate to [0, ∞) x X for some compact connected Ricci-flat manifold X. We begin by proving general structure...

/dk/atira/pure/subjectarea/asjc/2600/2603 name=Analysis /dk/atira/pure/subjectarea/asjc/2600/2602 name=Algebra and Number Theory /dk/atira/pure/subjectarea/asjc/2600/2608 name=Geometry and Topology
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Cover Image for Asymptotically cylindrical Calabi-Yau manifolds View Article
Asymptotically cylindrical Calabi-Yau manifolds
Haskins Mark, Hans Joachim Hein, Nordström Johannes
Oct 31, 2015

Let M be a complete Ricci-flat Kähler manifold with one end and assume that this end converges at an exponential rate to [0, ∞) x X for some compact connected Ricci-flat manifold X. We begin by proving general structure...

/dk/atira/pure/subjectarea/asjc/2600/2603 name=Analysis /dk/atira/pure/subjectarea/asjc/2600/2602 name=Algebra and Number Theory /dk/atira/pure/subjectarea/asjc/2600/2608 name=Geometry and Topology
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Cover Image for New invariants of G<sub>2</sub>-structures View Article
New invariants of G<sub>2</sub>-structures
Diarmuid Crowley, Johannes Nordström
Dec 31, 2015
We define a Z/48-valued homotopy invariant nu of a G_2-structure on the tangent bundle of a closed 7-manifold in terms of the signature and Euler characteristic of a coboundary with a Spin(7)-structure. For manifolds of holonomy...
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Cover Image for The rational homotopy type of (n-1)-connected manifolds of dimension up to 5n-3 View Article
The rational homotopy type of (n-1)-connected manifolds of dimension up to 5n-3
Diarmuid Crowley, Johannes Nordström
Jun 01, 2020

We define the Bianchi–Massey tensor of a topological space (Formula presented.) to be a linear map (Formula presented.), where (Formula presented.) is a subquotient of (Formula presented.) determined by the algebra (Formula...

55P62 57R19 (primary) /dk/atira/pure/subjectarea/asjc/2600/2608 name=Geometry and Topology
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Cover Image for Asymptotically cylindrical Calabi–Yau 3–folds from weak Fano 3–folds View Article
Asymptotically cylindrical Calabi–Yau 3–folds from weak Fano 3–folds
Alessio Corti, Mark Haskins, Johannes Nordström, Tommaso Pacini
Jul 15, 2013
We prove the existence of asymptotically cylindrical (ACyl) Calabi–Yau 3–folds starting with (almost) any deformation family of smooth weak Fano 3–folds. This allow us to exhibit hundreds of thousands of new ACyl Calabi–Yau...
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Cover Image for G<sub>2</sub>-Manifolds and associative submanifolds via semi-fano 3-folds View Article
G<sub>2</sub>-Manifolds and associative submanifolds via semi-fano 3-folds
Alessio Corti, Mark Haskins, Johannes Nordström, Tommaso Pacini
Jul 15, 2015

We construct many new topological types of compact G2-manifolds, that is, Riemannian 7-manifolds with holonomy group G2. To achieve this we extend the twisted connected sum construction first developed by Kovalev...

/dk/atira/pure/subjectarea/asjc/2600/2600 name=General Mathematics
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Cover Image for New invariants of G<sub>2</sub>-structures View Article
New invariants of G<sub>2</sub>-structures
Diarmuid Crowley, Johannes Nordström
Dec 31, 2015
We define a Z/48-valued homotopy invariant nu of a G_2-structure on the tangent bundle of a closed 7-manifold in terms of the signature and Euler characteristic of a coboundary with a Spin(7)-structure. For manifolds of holonomy...
Published by:
Cover Image for The rational homotopy type of (n-1)-connected manifolds of dimension up to 5n-3 View Article
The rational homotopy type of (n-1)-connected manifolds of dimension up to 5n-3
Diarmuid Crowley, Johannes Nordström
Jun 01, 2020

We define the Bianchi–Massey tensor of a topological space (Formula presented.) to be a linear map (Formula presented.), where (Formula presented.) is a subquotient of (Formula presented.) determined by the algebra (Formula...

55P62 57R19 (primary) /dk/atira/pure/subjectarea/asjc/2600/2608 name=Geometry and Topology
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Cover Image for G<sub>2</sub>-Manifolds and associative submanifolds via semi-fano 3-folds View Article
G<sub>2</sub>-Manifolds and associative submanifolds via semi-fano 3-folds
Alessio Corti, Mark Haskins, Johannes Nordström, Tommaso Pacini
Jul 15, 2015

We construct many new topological types of compact G2-manifolds, that is, Riemannian 7-manifolds with holonomy group G2. To achieve this we extend the twisted connected sum construction first developed by Kovalev...

/dk/atira/pure/subjectarea/asjc/2600/2600 name=General Mathematics
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Cover Image for Tumor Suppression by a TRNA Synthetase View Article
Tumor Suppression by a TRNA Synthetase
Maria Passarelli
Jan 01, 0001
Despite substantial progress in treatment, breast cancer remains a leading cause of cancer mortality among women. During malignant transformation, healthy mammary cells must bypass tumor suppressive checkpoints and activate...
Life Sciences
Published by: Rockefeller University
Cover Image for A Novel Interception Strategy in a Miniature Robber Fly with Extreme Visual Acuity View Article
A Novel Interception Strategy in a Miniature Robber Fly with Extreme Visual Acuity
TJ Wardill, ST Fabian, AC Pettigrew, DG Stavenga, K Nordström, PT Gonzalez Bellido
Apr 10, 2017
Vision invertebrate Retina spatial resolution predation Flight interception strategy moving target tracking
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Cover Image for Asymptotically cylindrical Calabi–Yau 3–folds from weak Fano 3–folds View Article
Asymptotically cylindrical Calabi–Yau 3–folds from weak Fano 3–folds
Alessio Corti, Mark Haskins, Johannes Nordström, Tommaso Pacini
Jul 15, 2013
We prove the existence of asymptotically cylindrical (ACyl) Calabi–Yau 3–folds starting with (almost) any deformation family of smooth weak Fano 3–folds. This allow us to exhibit hundreds of thousands of new ACyl Calabi–Yau...
Published by:
Cover Image for SU(2)^2xU(1)-invariant G_2-instantons on the AC limit of the C7 family View Article
SU(2)^2xU(1)-invariant G_2-instantons on the AC limit of the C7 family
Karsten Matthies, Johannes Nordström, Matt Turner
Jun 29, 2023
We construct SU(2)^2xU(1)-invariant G_2-instantons on the asymptotically conical limit of the C7 family of G_2-metrics. The construction uses a dynamical systems approach involving perturbations of an abelian solution and a...
math.DG math.DS 53C07 53C25
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Cover Image for SU(2)^2xU(1)-invariant G_2-instantons on the AC limit of the C7 family View Article
SU(2)^2xU(1)-invariant G_2-instantons on the AC limit of the C7 family
Karsten Matthies, Johannes Nordström, Matt Turner
Jun 29, 2023
We construct SU(2)^2xU(1)-invariant G_2-instantons on the asymptotically conical limit of the C7 family of G_2-metrics. The construction uses a dynamical systems approach involving perturbations of an abelian solution and a...
math.DG math.DS 53C07 53C25
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Cover Image for Visual approach computation in feeding hoverflies. View Article
Visual approach computation in feeding hoverflies.
Malin Thyselius, Paloma T Gonzalez-Bellido, Trevor J Wardill, Karin Nordström
Jun 29, 2018
Approach Foraging behavior Looming stimuli Motion vision Retinal size Target detection Animals Bees Diptera Feeding Behavior Female Flight Animal Flowers Predatory Behavior Video Recording Vision Ocular Wasps
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Cover Image for Target detection in insects View Article
Target detection in insects
Paloma T Gonzalez-Bellido, Samuel T Fabian, Karin Nordström
Oct 31, 2016
Animals Behavior Animal Insecta Motion perception Neurons Vision Ocular
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Cover Image for Adolescent cannabis use, baseline prodromal symptoms and the risk of psychosis. View Article
Adolescent cannabis use, baseline prodromal symptoms and the risk of psychosis.
Antti Mustonen, Solja Niemelä, Tanja Nordström, Graham K Murray, Pirjo Mäki, Erika Jääskeläinen, Jouko Miettunen
May 11, 2018
BACKGROUND: The association between cannabis use and the risk of psychosis has been studied extensively but the temporal order still remains controversial. Aims To examine the association between cannabis use in adolescence and...
Adolescent Adolescent Behavior Adult Female Finland Follow-Up Studies Humans Male Marijuana Use Prodromal Symptoms Psychotic Disorders Registries risk Young Adult
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