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A curvature condition for a twisted product¶to be a warped product

Manuscripta mathematica, 2001-10, Vol.106 (2), p.213-217

2001

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On Level Sets of Lorentzian Distance Function

General relativity and gravitation, 2003-09, Vol.35 (9), p.1597-1615

2003

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The generalized divergence theorem and its application to harmonic maps

Nonlinear analysis, 2001-08, Vol.47 (5), p.2995-3004

2001

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Affine Osserman connections and their Riemann extensions

Differential geometry and its applications, 1999-09, Vol.11 (2), p.145-153

1999

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Singular Semi-Riemannian Geometry

Kupeli, D. N

1, 1996

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On a problem of Osserman in Lorentzian geometry

Differential geometry and its applications, 1997-03, Vol.7 (1), p.85-100

1997

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Erratum to the paper: F. Erkekoğlu, D. N. Kupeli and B. Übnal, Some results related to the Laplacian on vector fields, Publ. Math. Debrecen 69 (2006), 137–154

Publicationes mathematicae (Debrecen), 2007-01, Vol.70 (1-2), p.249-249

2007

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Semi-Riemannian Maps and Their Applications

1, 1999

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On a differential equation characterizing Euclidean spheres

Journal of Differential Equations, 2003-11, Vol.194 (2), p.287-299

2003

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A local characterization of Schwarzschild and Reissner metrics

General relativity and gravitation, 1994-12, Vol.26 (12), p.1233-1248

1994

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A characterization of the local structure of static stars

Publicationes mathematicae (Debrecen), 1997-01, Vol.50 (1-2), p.87-96

1997

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Null cut Loci of spacelike surfaces

General relativity and gravitation, 1988-05, Vol.20 (5), p.415-425

KUPELI, D. N

1988

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On existence and comparison of conjugate points in Riemannian and Lorentzian geometry

Mathematische annalen, 1986-03, Vol.276 (1), p.67-79

Kupeli, D. N.

1986

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Curvature and closed trapped surfaces in 4-dimensional space-times

General relativity and gravitation, 1987, Vol.19 (1), p.23-41

KUPELI, D. N

1987

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Characterizing Specific Riemannian Manifolds by Differential Equations

Acta applicandae mathematicae, 2003-04, Vol.76 (2), p.195

2003

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A local analytic characterization of Schwarzschild metrics

Journal of geometry and physics, 2003-03, Vol.45 (3), p.309-322

2003

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A Characterization of Cosmological Time Functions

Annals of global analysis and geometry, 2002-03, Vol.21 (1), p.1

2002

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The eikonal equation of an indefinite metric

Acta applicandae mathematicae, 1995-09, Vol.40 (3), p.245-253

Kupeli, Demir N.

1995

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Some sufficient conditions for a map to be harmonic

Publicationes mathematicae (Debrecen), 2000-10, Vol.57 (3-4), p.487-498

2000

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The Local Möbius Equation and Decomposition Theorems in Riemannian Geometry

Canadian mathematical bulletin, 2002-09, Vol.45 (3), p.378-387

2002

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A rigid singularity theorem for spacetimes admitting irrotational reference frames

Journal of geometry and physics, 1998-11, Vol.28 (1), p.158-162

1998

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On null submanifolds in spacetimes

Geometriae dedicata, 1987-05, Vol.23 (1)

Kupeli, DemirN

1987

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On affine Riemannian maps

Archiv der Mathematik, 1998-07, Vol.71 (1), p.71-79

1998

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Singularity versus splitting theorems for stably causal spacetimes

Annals of global analysis and geometry, 1996-08, Vol.14 (3), p.301-312

1996

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On conjugate and focal points in semi-Riemannian geometry

Mathematische Zeitschrift, 1988-12, Vol.198 (4), p.569-589

Kupeli, Demir N.

1988

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A curvature condition for a twisted product¶to be a warped product

On Level Sets of Lorentzian Distance Function

The generalized divergence theorem and its application to harmonic maps

Affine Osserman connections and their Riemann extensions

Singular Semi-Riemannian Geometry

On a problem of Osserman in Lorentzian geometry

Erratum to the paper: F. Erkekoğlu, D. N. Kupeli and B. Übnal, Some results related to the Laplacian on vector fields, Publ. Math. Debrecen 69 (2006), 137–154

Semi-Riemannian Maps and Their Applications

On a differential equation characterizing Euclidean spheres

A local characterization of Schwarzschild and Reissner metrics

A characterization of the local structure of static stars

Null cut Loci of spacelike surfaces

On existence and comparison of conjugate points in Riemannian and Lorentzian geometry

Curvature and closed trapped surfaces in 4-dimensional space-times

Characterizing Specific Riemannian Manifolds by Differential Equations

A local analytic characterization of Schwarzschild metrics

A Characterization of Cosmological Time Functions

The eikonal equation of an indefinite metric

Some sufficient conditions for a map to be harmonic

The Local Möbius Equation and Decomposition Theorems in Riemannian Geometry

A rigid singularity theorem for spacetimes admitting irrotational reference frames

On null submanifolds in spacetimes

On affine Riemannian maps

Singularity versus splitting theorems for stably causal spacetimes

On conjugate and focal points in semi-Riemannian geometry

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