Professor
Sigbjørn Hervik { "honorific-suffix": "Professor", "fn": "Sigbjørn Hervik", "tel": "Telefon: 51831703", "email": "sigbjorn.hervik@uis.no" }

Telefon: 51831703
sigbjorn.hervik@uis.no

Avdeling/enhet	Det teknisk- naturvitenskapelige fakultet
Institutt/senter	Institutt for matematikk og fysikk
Rom	KE C-314
Tlf priv/mob	+47 41581800

Undervisning

Forskningsområder

Research Interests:

Riemannian Geometry/Lorentzian Geometry
Lie groups/algebras
Homogeneous spaces
Relativity
Cosmology (mathematical aspects)
Alternative theories of gravity
Classification issues for exact solutions in GR.

Utvalgte publikasjoner

Pågående forskning

Pseudo-Riemannian Geometry and polynomial curvature invariants, NFR-Toppforsk grant.

Arbeidserfaring

Vitenskapelige publikasjoner (fra CRISTin)

Vitenskapelige publikasjoner
Formidling

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 Black Holes. Journal of High Energy Physics (JHEP). ISSN 1126-6708. DOI: 10.1007/JHEP02(2020)047.
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.
Normann, Ben David; Hervik, Sigbjørn (2020). Collins in Wonderland. Classical and quantum gravity. ISSN 0264-9381. Volum 37. DOI: 10.1088/1361-6382/ab8be7.
Normann, Ben David; Hervik, Sigbjørn; Ricclardone, Angelo; Thorsrud, Mikjel (2020). A study of inhomogeneous massless scalar gauge fields in cosmology. International Journal of Modern Physics, Conference Series. ISSN 2010-1945.
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.
Hervik, Sigbjørn (2018). On a new class of infinitesimal group actions on pseudo-Riemannian manifolds. arXiv.org. ISSN 2331-8422.
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/aad13d.
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.
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.
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.
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.
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.
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.
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.
Hervik, Sigbjørn; Pravda, Vojtech; Pravdova, Alena (2015). Type III and II universal spacetimes. Journal of Physics: Conference Series. 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. ISSN 1742-6588. Volum 600. Hefte 1. DOI: 10.1088/1742-6596/600/1/012065.
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.
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.
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.
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.
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. ISSN 1475-7516. Volum 2013. Hefte 10. DOI: 10.1088/1475-7516/2013/10/005.
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.
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 (2011). Universality and Constant Scalar Curvature Invariants. ISRN Geometry. ISSN 2090-6307. DOI: 10.5402/2011/248615.
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). 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.
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; 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.
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.
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.
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.
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; 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.
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.
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; 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; 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.
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; 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; 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.
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; 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.
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.

Hervik, Sigbjørn (2018). On spaces having identical polynomial curvature invariants. 2018-11-15.
Hervik, Sigbjørn (2016). Wick rotations and Holomorphic Riemannian geometry. 2016-11-03 - 2016-11-04.
Hervik, Sigbjørn (2015). Differensialligninger.
Hervik, Sigbjørn (2014). Abelprisen 2014.
Hervik, Sigbjørn (2014). Følger, rekker og diskret matematikk.
Hervik, Sigbjørn (2014). Partikkelfysikk.
Hervik, Sigbjørn (2014). The Universe -- Cracking the code. 2014-12-08 - 2014-12-10.
Hervik, Sigbjørn (2012). Nobelprisen i Fysikk 2011. NTVA; 2012-02-09.
Hervik, Sigbjørn (2011). Herfra til Uendeligheten.