Sigbjørn Hervik

Professor

Sigbjørn Hervik

Contact

Telephone: 51831703

Email: sigbjorn.hervik@uis.no

Room: KE E-532

Department

Faculty of Science and Technology

Department of Mathematics and Physics

Publications

Vitenskapelige publikasjoner

Hervik, Sigbjørn

(2024)

Left-invariant pseudo-Riemannian metrics on Lie groups: The null cone.

Differential geometry and its applications.

ISSN 0926-2245.

Volum 97.

DOI: 10.1016/j.difgeo.2024.102205

Normann, Ben David; Ricciardone, Angelo; Hervik, Sigbjørn; Thorsrud, Mikjel

(2022)

A study of inhomogeneous massless scalar gauge fields in cosmology.

International Journal of Modern Physics, Conference Series.

ISSN 2010-1945.

s.1378-1883.

DOI: 10.1142/9789811258251_0199

McNutt, David Duncan; Hervik, Sigbjørn; Dahl, Eivind Evenstad

(2022)

Building new Einstein spaces by deforming symmetric Einstein spaces. I: Geometry, Lie Theory and Applications: The Abel Symposium 2019.

Springer.

ISBN 978-3-030-81295-9.

s.223-252.

DOI: 10.1007/978-3-030-81296-6_11

Normann, Ben David; Hervik, Sigbjørn

(2020)

Approaching Wonderland.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 37.

Hefte 8.

s.1-47.

DOI: 10.1088/1361-6382/ab719b

Hervik, Sigbjørn; Ortaggio, Marcello

(2020)

Universal Black Holes.

Journal of High Energy Physics (JHEP).

ISSN 1126-6708.

DOI: 10.1007/JHEP02(2020)047

Normann, Ben David; Hervik, Sigbjørn

(2020)

Collins in Wonderland.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 37.

DOI: 10.1088/1361-6382/ab8be7

Hervik, Sigbjørn; Ortaggio, Marcello

(2020)

On Universal Black Holes.

Acta Physica Polonica B, Proceedings Supplement.

ISSN 1899-2358.

Volum 13.

Hefte 2.

s.291-295.

DOI: 10.5506/APhysPolBSupp.13.291

Hervik, Sigbjørn; Ortaggio, Marcello

(2020)

Universal p-form black holes in generalized theories of gravity.

European Physical Journal C.

ISSN 1434-6044.

Volum 80.

DOI: 10.1140/epjc/s10052-020-08571-x

Barausse, Enrico; Berti, Emanuele; Hertog, Thomas; Hughes, Scott A.; Jetzer, Philippe; Pani, Paolo; Hervik, Sigbjørn; Kolesova, Helena; Marcoccia, Paolo; Nardini, Germano; Nielsen, Alex Bentley; Sotiriou, Thomas P.; Tamanini, Nicola; Witek, Helvi; Yagi, Kent; Yunes, Nicolás; Abdelsahin, T.; Achucarro, A.; van Aelst, K.; Afshordi, N.; Akcay, S.; Annulli, L.; Arun, K.G.; Ayuso, I.; Baibhav, V.; Baker, T.; Bantilan, H.; Barreiro, T.; Barrera-Hinojosa, C.; Bartolo, N.; Baumann, D.; Belgacem, E.; Bellini, E.; Bellomo, N.; Ben-Dayan, I.; Bena, I.; Benkel, R.; Bergshoefs, E.; Bernard, L.; Bernuzzi, S.; Bertacca, D.; Besancon, M.; Beutler, F.; Beyer, F.; Bhagwat, S.; Bicak, J.; Biondini, S.; Bize, S.; Blas, D.; Boehmer, C.

(2020)

Prospects for fundamental physics with LISA.

General Relativity and Gravitation.

ISSN 0001-7701.

Volum 52.

DOI: 10.1007/s10714-020-02691-1

Helleland, Christer; Hervik, Sigbjørn

(2019)

Real GIT with applications to compatible representations and Wick-rotations.

Journal of Geometry and Physics.

ISSN 0393-0440.

Volum 142.

s.92-110.

DOI: 10.1016/j.geomphys.2019.03.007

Hervik, Sigbjørn; McNutt, David Duncan

(2019)

Locally Homogeneous Kundt Triples and CSI Metrics.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 36.

Hefte 18.

DOI: 10.1088/1361-6382/ab3296

McNutt, David Duncan; Wylleman, Lode; Coley, Alan; Hervik, Sigbjørn

(2019)

Locally Boost Isotropic Spacetimes and the Type ${\bf D}^k$ Condition.

arXiv.org.

ISSN 2331-8422.

Normann, Ben David; Hervik, Sigbjørn; Ricciardone, Angelo; Thorsrud, Mikjel

(2018)

Bianchi cosmologies with p-form gauge fields.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 35.

Hefte 9.

DOI: 10.1088/1361-6382/aab3a7

Hervik, Sigbjørn; Malek, Tomas

(2018)

Universal Walker metrics.

Physica Scripta.

ISSN 0031-8949.

Volum 93.

Hefte 8.

s.1-12.

DOI: 10.1088/1402-4896/aace9c

Hervik, Sigbjørn; Ortaggio, Marcello; Pravda, Vojtech

(2018)

Universal electromagnetic fields.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 35.

Hefte 17.

s.1-19.

DOI: 10.1088/1361-6382/aad13

Hervik, Sigbjørn

(2018)

On a new class of infinitesimal group actions on pseudo-Riemannian manifolds.

arXiv.org.

ISSN 2331-8422.

Helleland, Christer; Hervik, Sigbjørn

(2017)

Wick rotations and real GIT.

Journal of Geometry and Physics.

ISSN 0393-0440.

Volum 123.

s.343-361.

DOI: 10.1016/j.geomphys.2017.09.009

Helleland, Christer; Hervik, Sigbjørn

(2017)

A Wick-rotatable metric is purely electric.

Journal of Geometry and Physics.

ISSN 0393-0440.

Volum 123.

s.424-429.

DOI: 10.1016/j.geomphys.2017.09.015

Hervik, Sigbjørn; Pravda, Vojtech; Pravdova, Alena

(2017)

Universal spacetimes in four dimensions.

Journal of High Energy Physics (JHEP).

ISSN 1126-6708.

Volum 2017.

Hefte 10.

DOI: 10.1007/JHEP10(2017)028

Gregersen, Øyvind Weiby; Kløkstad, Geir Øivind; Hervik, Sigbjørn; Plesser, Hans Ekkehard; Pettersen, Ivar

(2017)

Some factors affecting the grades of technology students.

Nordic Journal of STEM Education.

ISSN 2535-4574.

Volum 1.

Hefte 1.

s.167-173.

Hervik, Sigbjørn; Pravda, Vojtech; Pravdova, Alena

(2015)

Type III and II universal spacetimes.

Journal of Physics: Conference Series (JPCS).

ISSN 1742-6588.

Volum 600:012066.

DOI: 10.1088/1742-6596/600/1/012066

Hervik, Sigbjørn; Pravda, Vojtech; Pravdova, Alena

(2015)

Type N universal spacetime.

Journal of Physics: Conference Series (JPCS).

ISSN 1742-6588.

Volum 600.

Hefte 1.

DOI: 10.1088/1742-6596/600/1/012065

Shogin, Dmitry; Hervik, Sigbjørn

(2015)

Dynamics of tilted Bianchi models of types III, IV, V in presence of diffusion.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 32.

Hefte 5.

DOI: 10.1088/0264-9381/32/5/055008

Hervik, Sigbjørn; Haarr, Anders; Yamamoto, Kei

(2015)

I-degenerate pseudo-Riemannian metrics.

Journal of Geometry and Physics.

ISSN 0393-0440.

Volum 98.

s.384-399.

DOI: 10.1016/j.geomphys.2015.08.019

Shogin, Dmitry; Amundsen, Per Amund; Hervik, Sigbjørn

(2015)

On the viability of the truncated Israel–Stewart theory in cosmology.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 32.

Hefte 19.

s.1-14.

DOI: 10.1088/0264-9381/32/19/195012

Hervik, Sigbjørn; Malek, Tomas; Pravda, Vojtech; Pravdova, Alena

(2015)

Type II universal spacetimes.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 32.

DOI: 10.1088/0264-9381/32/24/245012

Coley, Alan; Hervik, Sigbjørn; McNutt, David; Musoke, Nathan; Brooks, Dario

(2014)

Neutral signature Walker-VSI metrics.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 31.

Hefte 3.

DOI: 10.1088/0264-9381/31/3/035015

Hervik, Sigbjørn; Ortaggio, Marcello; Wylleman, Lode

(2014)

Electric and magnetic Weyl tensors in higher dimensions.

Springer Proceedings in Physics.

ISSN 0930-8989.

Volum 157.

s.287-290.

DOI: 10.1007/978-3-319-06761-2_38

Hervik, Sigbjørn; Pravda, Vojtech; Pravdova, Alena

(2014)

Type III and N universal spacetimes.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 31.

Hefte 21.

DOI: 10.1088/0264-9381/31/21/215005

Shogin, Dmitry; Hervik, Sigbjørn

(2014)

The late-time behaviour of tilted Bianchi type VIII universes in presence of diffusion.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 31.

Hefte 13.

DOI: 10.1088/0264-9381/31/13/135006

Hervik, Sigbjørn; Ortaggio, Marcello; Wylleman, Lode

(2013)

Minimal tensors and purely electric or magnetic spacetimes of arbitrary dimension.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 30.

Hefte 16.

DOI: 10.1088/0264-9381/30/16/165014

Shogin, Dmitry; Hervik, Sigbjørn

(2013)

Evolution of a simple inhomogeneous anisotropic cosmological model with diffusion.

Journal of Cosmology and Astroparticle Physics (JCAP).

ISSN 1475-7516.

Volum 2013.

Hefte 10.

DOI: 10.1088/1475-7516/2013/10/005

Gurses, Metin; Hervik, Sigbjørn; Sisman, Tahsin; Tekin, Bayram

(2013)

Anti–de Sitter–wave solutions of higher derivative Theories.

Physical Review Letters.

ISSN 0031-9007.

Volum 111.

Hefte 10.

DOI: 10.1103/PhysRevLett.111.101101

Alcolado, A; MacDougall, A; Coley, Alan; Hervik, Sigbjørn

(2012)

4D neutral signature VSI and CSI spaces.

Journal of Geometry and Physics.

ISSN 0393-0440.

Volum 62.

Hefte 3.

s.594-603.

DOI: 10.1016/j.geomphys.2011.04.012

Coley, Alan; Hervik, Sigbjørn; Ortaggio, Marcello; Wylleman, Lode

(2012)

Refinements of the Weyl tensor classification in five dimensions.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 29.

Hefte 15.

DOI: 10.1088/0264-9381/29/15/155016

Hervik, Sigbjørn

(2012)

Pseudo-Riemannian VSI spaces II.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 29.

Hefte 9.

DOI: 10.1088/0264-9381/29/9/095011

Thorsrud, Mikjel; Mota, David ; Hervik, Sigbjørn

(2012)

Cosmology of a scalar field coupled to matter and an isotropy-violating Maxwell field.

Journal of High Energy Physics (JHEP).

ISSN 1126-6708.

Hefte 10.

DOI: 10.1007/JHEP10(2012)066

Hervik, Sigbjørn; Coley, Alan

(2011)

Pseudo-Riemannian VSI spaces.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 28.

Hefte 1.

DOI: 10.1088/0264-9381/28/1/015008

Coley, Alan; Hervik, Sigbjørn

(2011)

Discriminating the Weyl type in higher dimensions using scalar curvature invariants.

General Relativity and Gravitation.

ISSN 0001-7701.

Volum 43.

Hefte 8.

s.2199-2207.

DOI: 10.1007/s10714-011-1174-x

Coley, Alan; Hervik, Sigbjørn; Durkee, Mark; Godazgar, Mahdi

(2011)

Algebraic classification of five-dimensional spacetimes using scalar invariants.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 28.

Hefte 15.

DOI: 10.1088/0264-9381/28/15/155016

Hervik, Sigbjørn

(2011)

All metrics have curvature tensors characterized by its invariants as a limit: the epsilon-property.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 28.

Hefte 15.

DOI: 10.1088/0264-9381/28/15/157001

Hervik, Sigbjørn; Coley, Alan

(2011)

On the algebraic classification of pseudo-Riemannian spaces.

International Journal of Geometric Methods in Modern Physics (IJGMMP).

ISSN 0219-8878.

Volum 8.

Hefte 8.

s.1679-1685.

DOI: 10.1142/S0219887811005932

Hervik, Sigbjørn

(2011)

A spacetime not characterized by its invariants is of aligned type II.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 28.

Hefte 21.

DOI: 10.1088/0264-9381/28/21/215009

Coley, Alan; Hervik, Sigbjørn

(2011)

Universality and Constant Scalar Curvature Invariants.

ISRN Geometry.

ISSN 2090-6307.

DOI: 10.5402/2011/248615

Hervik, Sigbjørn; Mota, David ; Thorsrud, Mikjel

(2011)

Inflation with stable anisotropic hair: is it cosmologically viable?.

Journal of High Energy Physics (JHEP).

ISSN 1126-6708.

Hefte 11.

DOI: 10.1007/JHEP11(2011)146

Coley, Alan; Hervik, Sigbjørn

(2010)

Higher dimensional bivectors and classification of the Weyl operator.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 27.

Hefte 1.

DOI: 10.1088/0264-9381/27/1/015002

Barrow, John; Hervik, Sigbjørn

(2010)

Simple types of anisotropic inflation.

Physical Review D. Particles and fields.

ISSN 0556-2821.

Volum 81.

Hefte 2.

DOI: 10.1103/PhysRevD.81.023513

Hervik, Sigbjørn; Coley, Alan

(2010)

Curvature operators and scalar curvature invariants.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 27.

Hefte 9.

DOI: 10.1088/0264-9381/27/9/095014

Coley, Alan; Hervik, Sigbjørn; Pelavas, Nicos

(2010)

Lorentzian manifolds and scalar curvature invariants.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 27.

Hefte 10.

DOI: 10.1088/0264-9381/27/10/102001

Hervik, Sigbjørn; Lim, Woei Chet; Sandin, Patrik; Uggla, Claes

(2010)

Future asymptotics of tilted Bianchi type II cosmologies.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 27.

Hefte 18.

DOI: 10.1088/0264-9381/27/18/185006

Coley, Alan; Fuster, Andrea; Hervik, Sigbjørn

(2009)

SUPERGRAVITY SOLUTIONS WITH CONSTANT SCALAR INVARIANTS.

International Journal of Modern Physics A.

ISSN 0217-751X.

Volum 24.

Hefte 6.

s.1119-1133.

Coley, Alan; Hervik, Sigbjørn; Pelavas, Nicos

(2009)

Spacetimes characterized by their scalar curvature invariants.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 26.

Hefte 2.

DOI: 10.1088/0264-9381/26/2/025013

Coley, Alan; Hervik, Sigbjørn; Pelavas, Nicos

(2009)

Lorentzian spacetimes with constant curvature invariants in four dimensions.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 26.

Hefte 12.

DOI: 10.1088/0264-9381/26/12/125011

Coley, Alan; Hervik, Sigbjørn; Papadopoulos, G.; Pelavas, Nicos

(2009)

Kundt spacetimes.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 26.

Hefte 10.

DOI: 10.1088/0264-9381/26/10/105016

Coley, Alan; Hervik, Sigbjørn; Lim, Woei Chet; MacCallum, Malcolm

(2009)

Properties of kinematic singularities.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 26.

Hefte 21.

DOI: 10.1088/0264-9381/26/21/215008

Brannlund, Johan; Coley, Alan; Hervik, Sigbjørn

(2009)

Holonomy, decomposability, and relativity(1).

Canadian journal of physics (Print).

ISSN 0008-4204.

Volum 87.

Hefte 3.

s.241-243.

DOI: 10.1139/P08-092

Coley, A.; Hervik, Sigbjørn

(2009)

Note on the invariant classification of vacuum type D spacetimes.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 26.

Hefte 24.

DOI: 10.1088/0264-9381/26/24/247001

Coley, Alan; Gibbons, Gary; Hervik, Sigbjørn; Pope, C.N.

(2008)

Metrics with vanishing quantum corrections.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 25.

Hefte 14.

DOI: 10.1088/0264-9381/25/14/145017

Brannlund, Johan; Coley, Alan; Hervik, Sigbjørn

(2008)

Supersymmetry, holonomy and Kundt spacetimes.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 25.

Hefte 19.

DOI: 10.1088/0264-9381/25/19/195007

Coley, Alan; Hervik, Sigbjørn

(2008)

A note on tilted Bianchi type VIh models: the type III bifurcation.

Classical and Quantum Gravity.

ISSN 0264-9381.

Volum 25.

Hefte 19.

DOI: 10.1088/0264-9381/25/19/198001

Bøker og kapitler

Hervik, Sigbjørn; Kruglikov, Boris; Markina, Irina; The, Dennis

(2022)

Geometry, Lie Theory and Applications: The Abel Symposium 2019.

Springer.

ISBN 978-3-030-81295-9.

Hefte 16.

Hervik, Sigbjørn; Kruglikov, Boris; Markina, Irina; The, Dennis

(2022)

Geometry, Lie Theory and Applications: The Abel Symposium 2019.

Springer.

ISBN 978-3-030-81295-9.

DOI: 10.1007/978-3-030-81296-6

Formidling

Skartveit, Iben; Hervik, Sigbjørn

(2024)

Ta vare på realfagsheltene!.

Stavanger Aftenblad.

ISSN 0804-8991.

Hervik, Sigbjørn

(2024)

Our Mathematical Universe: Gravity, Symmetry and Dynamical Systems.

International Convergence: A Global Forum for Mathematics and Physics;

2024-10-24 - 2024-10-25.

Tranberg, Anders; Hervik, Sigbjørn; Copeland, Edmund

(2024)

Wonderful World: Dark Energy (moderator).

Wonderful World Festival, 2024;

2024-06-01 - .

Tranberg, Anders; Hervik, Sigbjørn; Wehus, Ingunn Kathrine; Nielsen, Alex Bentley

(2023)

Q&A - Generell relativitet og interstellar vitenskap.

Wonderful World -nordisk festival for filosofi og vitenskap ;

2023-06-01 - .

Hervik, Sigbjørn

(2022)

On spaces having identical polynomial curvature invariants. .

Norsk Matematikermøte 2022;

2022-09-01 - 2022-09-02.

Hervik, Sigbjørn

(2018)

On spaces having identical polynomial curvature invariants.

Geometry and Relativity;

2018-11-15.

Hervik, Sigbjørn

(2016)

Wick rotations and Holomorphic Riemannian geometry.

Geometry and Lie theory;

2016-11-03 - 2016-11-04.

Hervik, Sigbjørn

(2015)

Differensialligninger.

RFK fagdag for VGS;

2015-11-13 - .

Hervik, Sigbjørn

(2014)

Følger, rekker og diskret matematikk.

Åpen Fagdag RFK;

2014-11-07 - .

Hervik, Sigbjørn

(2014)

Partikkelfysikk.

Gjesteforelesning;

2014-11-12 - .

Hervik, Sigbjørn

(2014)

Abelprisen 2014.

Abelprisen 2014;

2014-05-21 - .

Hervik, Sigbjørn

(2014)

The Universe -- Cracking the code.

Passwords 14;

2014-12-08 - 2014-12-10.

Hervik, Sigbjørn

(2012)

Nobelprisen i Fysikk 2011.

NTVA - seminarer;

2012-02-09.

Hervik, Sigbjørn

(2011)

Herfra til Uendeligheten.

Script.

Hefte 2.