Articles

CONFORMAL AND GENERALIZED CONCIRCULAR MAPPINGS OF EINSTEIN-WEYL MANIFOLDS

  • Abdulkadir ?zdeger
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  • Faculty of Arts and Sciences, Kadir Has University, Cibali Campus, Cibali-Istanbul 34083, Turkey

Received date: 2007-08-10

  Revised date: 2009-02-20

  Online published: 2010-09-20

Abstract

In this article, after giving a necessary and sufficient condition for two Einstein-Weyl manifolds to be in conformal correspondence, we prove that any conformal mapping between such manifolds is generalized concircular if and only if the covector  field of the conformal mapping is locally a
gradient. Using this fact we deduce that any conformal mapping between two isotropic Weyl manifolds is a generalized concircular mapping. Moreover, it is shown that a generalized concircularly flat Weyl manifold is generalized concircular to an Einstein manifold and that its scalar curvature is prolonged covariant constant.

Cite this article

Abdulkadir ?zdeger . CONFORMAL AND GENERALIZED CONCIRCULAR MAPPINGS OF EINSTEIN-WEYL MANIFOLDS[J]. Acta mathematica scientia, Series B, 2010 , 30(5) : 1739 -1745 . DOI: 10.1016/S0252-9602(10)60167-1

References


[1]  Fialkow A. Conformal geodesics. Trans Amer Math Soc, 1939, 45: 443--473


[2]  Nomizu K, Yano K. On circles and spheres in Riemannian geometry. Math Ann, 1974, 210: 163--170


[3]  Yano K. Concircular geometry, I-V. Proc Imp Acad, 1940, 16: 195-200, 354-360, 442-448, 505-511; 1942, 18: 446--451


[4]  Tashiro Y. Remarks on a theorem concerning conformal transformations. Proc Imp Acad, 1959, 35: 421--422


[5]  Ishihara S, Tashiro Y. On Riemannian manifolds admitting a concircular transformation. Math J Okayama Univ, 1959, 9: 19--47


[6]  Özdeger A, Senturk Z. Generalized circles in a Weyl space and their conformal mapping. Publ Math Debrecen, 2002, 60(1/2): 75--87


[7]  Hlavaty V. Theorie d'immersion d'une Wm dans Wn.  Ann Soc Polon, Math, 1949, 21: 196--206


[8]  Norden A. Affinely Connected Spaces. Moscow: Nauka, 1976


[9]  Zlatanov G, Tsareva B. On the geometry of the nets in the n-dimensional space of Weyl. J Geom, 1990, 38(1/2): 182--197


[10]  Hitchin N.J. Complex manifolds and Einstein's equations//Twistor geometry and non-linear systems. Lecture notes in Math, Vol 970. Berlin: Springer, 1982: 73--79


[11]  Pedersen H., Tod K.P.Three-dimensional Einstein-Weyl geometry. Adv Math, 1993, 97(1): 74--108


[12]  Lovelock D,  Rund H. Tensors, Differential Forms, and Variational Principles. New York: Dover Publ, 1989


[13]  Özdeger A. On sectional curvatures of a Weyl manifold. Proc Japan Acad, 2006, 82A(8): 123--125

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