P.J. Ryan's problem in semi-riemannian space forms

F. Defever; R. Deszcz; Z. Sentürk; L. Verstraelen; S. Yaprak

doi:10.1017/S0017089599970969

P.J. Ryan's problem in semi-riemannian space forms

F. Defever^*, R. Deszcz, Z. Sentürk, L. Verstraelen, S. Yaprak

^*Corresponding author for this work

KU Leuven

Research output: Contribution to journal › Article › peer-review

14 Citations (Scopus)

Abstract

We prove that the conditions R · R = 0 and R · S = 0 are equivalent for hypersurfaces of a 5-dimensional semi-Riemannian space form N⁵(c). This solves a problem by P.J. Ryan in the case of hypersurfaces of dimension 4 in semi-Riemannian space forms.

Original language	English
Pages (from-to)	271-281
Number of pages	11
Journal	Glasgow Mathematical Journal
Volume	41
Issue number	2
DOIs	https://doi.org/10.1017/S0017089599970969
Publication status	Published - 1999
Externally published	Yes

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title = "P.J. Ryan's problem in semi-riemannian space forms",

abstract = "We prove that the conditions R · R = 0 and R · S = 0 are equivalent for hypersurfaces of a 5-dimensional semi-Riemannian space form N5(c). This solves a problem by P.J. Ryan in the case of hypersurfaces of dimension 4 in semi-Riemannian space forms.",

author = "F. Defever and R. Deszcz and Z. Sent{\"u}rk and L. Verstraelen and S. Yaprak",

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AU - Defever, F.

AU - Deszcz, R.

AU - Sentürk, Z.

AU - Verstraelen, L.

AU - Yaprak, S.

PY - 1999

Y1 - 1999

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AB - We prove that the conditions R · R = 0 and R · S = 0 are equivalent for hypersurfaces of a 5-dimensional semi-Riemannian space form N5(c). This solves a problem by P.J. Ryan in the case of hypersurfaces of dimension 4 in semi-Riemannian space forms.

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U2 - 10.1017/S0017089599970969

DO - 10.1017/S0017089599970969

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VL - 41

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EP - 281

JO - Glasgow Mathematical Journal

JF - Glasgow Mathematical Journal

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ER -

P.J. Ryan's problem in semi-riemannian space forms

Abstract

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