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Autor:
Ráczi, Bahar Kırık1 bahar.kirik@marmara.edu.tr, Kılınç, Cihat1 cihatkilinc@marun.edu.tr, Toplu, Ramazan1 ramazantoplu@marun.edu.tr
Publikováno v:
Note di Matematica. 2023, Vol. 43 Issue 2, p83-98. 16p.
Autor:
Bahar Kırık
Publikováno v:
Filomat. 33:1249-1257
In the present study, some properties of Killing vector fields are investigated on 4-dimensional manifolds in case of the signature of the metric tensor 1 is either Lorentz or positive definite or neutral. First of all, the notation and the main obje
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fdbf5fa5f61eddd9162b9a0a41b0b65a
https://doi.org/10.2298/fil1904249k
https://doi.org/10.2298/fil1904249k
Autor:
Bahar Kırık, Graham Hall
Publikováno v:
Journal of Geometry and Physics. 133:168-180
This paper studies some general principles of metric (Killing) symmetry on a 4-dimensional, connected manifold M admitting a metric of neutral signature. First a general survey of neutral geometry is presented and this is followed by a discussion of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::069e870c8ff4b3916601d5998c79dfb2
https://doi.org/10.1016/j.geomphys.2018.07.006
https://doi.org/10.1016/j.geomphys.2018.07.006
Autor:
Bahar Kırık
Publikováno v:
Proceedings of the National Academy of Sciences, India Section A: Physical Sciences. 89:711-719
Generalized quasi-Einstein manifolds on 4-dimensional manifolds admitting a metric whose signature is one of the only possibilities $$(+, +, - , -)$$, $$(+, +, + , -)$$ and $$(+, +, +, +)$$ are based on the holonomy group of the Levi-Civita connectio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a6a30c3ad1cd61a04256d016c8786219
https://doi.org/10.1007/s40010-018-0505-7
https://doi.org/10.1007/s40010-018-0505-7
Autor:
Bahar Kırık, Füsun Özen Zengin
Publikováno v:
Bulletin of the Iranian Mathematical Society. 45:89-102
In this paper, we work on some properties of generalized quasi-Einstein and pseudo Ricci symmetric generalized quasi-Einstein manifolds. Firstly, some basic concepts about generalized quasi-Einstein manifolds are given. In the second section, the hol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3387da5776ccad2910e484cb12de3cae
https://doi.org/10.1007/s41980-018-0121-y
https://doi.org/10.1007/s41980-018-0121-y
Autor:
Bahar Kırık
Publikováno v:
Publications de l'Institut Math?matique (Belgrade). 103:103-112
We study recurrence properties of the second order skew-sym- metric tensor fields, which are referred to as bivectors, on a 4-dimensional manifold admitting a Lorentz metric. Considering the known classification scheme for these tensor fields, recurr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aea78342a27497caa91087efd588e4d6
https://doi.org/10.2298/pim1817103k
https://doi.org/10.2298/pim1817103k
Autor:
Bahar Kırık, Graham Hall
Publikováno v:
Journal of Geometry and Physics. 98:262-274
This paper studies the recurrence structure of second order symmetric tensors on a 4 -dimensional manifold M admitting a metric g of neutral signature ( + , + , − , − ) . The technique used is to first solve the problem when the tensor in questio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09ee00b8d7971d8cd74b7b22c2a3d788
https://doi.org/10.1016/j.geomphys.2015.08.004
https://doi.org/10.1016/j.geomphys.2015.08.004
Autor:
Füsun Özen Zengin, Bahar Kırık
Publikováno v:
Filomat. 29:525-534
As it is known, Einstein manifolds play an important role in geometry as well as in general relativity. Einstein manifolds form a natural subclass of the class of quasi-Einstein manifolds. In this work, we investigate conformal mappings of quasi-Eins
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a9bf30af5fa51964be7e0a28e14708ab
https://doi.org/10.2298/fil1503525k
https://doi.org/10.2298/fil1503525k
Autor:
Füsun Özen Zengin, Bahar Kırık
Publikováno v:
Miskolc Mathematical Notes. 14:629
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::33513e1938f3b97b38d2ac2a3c05d88c
https://doi.org/10.18514/mmn.2013.925
https://doi.org/10.18514/mmn.2013.925