In this paper, we characterize neutral Kähler surfaces in terms of their positive twistor bundle. We prove that an O+,+(2,2)-oriented four-dimensional neutral semi-Riemannian manifold (M,g) admits a complex structure J with ΩJ∈⋀−M, such that (M,g,J) is a neutral-Kähler manifold if and only if the twistor bundle (Z1(M),gc) admits a vertical Killing vector field
AbstractWe show that a natural class of twistorial maps gives a pattern for apparently different geo...
A study is made of algebraic curves and surfaces in the flag manifold $\mathbb{F}=SU(3)/T^2$, and th...
Abstract. I present a construction of real or complex selfdual conformal 4-manifolds (of signature (...
Properties of the Gauss map of neutral surfaces are studied. Special attention is given to surfaces ...
In this thesis we use the twistor theory in order to build non standard complex structures (with a m...
In this article we use the twistor theory in order to build "non standard" complex structures (with ...
23 pages.Let (M,g) be a Riemannian 4-manifold. The twistor space Z->M is a CP1-bundle whose total sp...
We study the totally null surfaces of the neutral Kähler metric on certain 4-manifolds. The tangent ...
We develop the twistor theory of G-structures for which the (linear) Lie algebra of the structure gr...
金沢大学人間社会研究域学校教育系We determine surfaces of genus zero in self-dual Einstein manifolds whose twistor li...
Abstract. A class of minimal almost complex submanifolds of a Riemannian manifold M ̃ 4n with a para...
A Walker 4-manifold is a semi-Riemannian manifold $(M_{4} ,g)$ of neutral signature, which admits a ...
An indefinite Riemannian manifold is called neutral it its index is equal to one half of its dimensi...
Dedicated to the memory of Jerzy Plebański Abstract: Using twistor methods, we explicitly construct...
Abstract. I present a construction of real or complex selfdual conformal 4-manifolds (of signature (...
AbstractWe show that a natural class of twistorial maps gives a pattern for apparently different geo...
A study is made of algebraic curves and surfaces in the flag manifold $\mathbb{F}=SU(3)/T^2$, and th...
Abstract. I present a construction of real or complex selfdual conformal 4-manifolds (of signature (...
Properties of the Gauss map of neutral surfaces are studied. Special attention is given to surfaces ...
In this thesis we use the twistor theory in order to build non standard complex structures (with a m...
In this article we use the twistor theory in order to build "non standard" complex structures (with ...
23 pages.Let (M,g) be a Riemannian 4-manifold. The twistor space Z->M is a CP1-bundle whose total sp...
We study the totally null surfaces of the neutral Kähler metric on certain 4-manifolds. The tangent ...
We develop the twistor theory of G-structures for which the (linear) Lie algebra of the structure gr...
金沢大学人間社会研究域学校教育系We determine surfaces of genus zero in self-dual Einstein manifolds whose twistor li...
Abstract. A class of minimal almost complex submanifolds of a Riemannian manifold M ̃ 4n with a para...
A Walker 4-manifold is a semi-Riemannian manifold $(M_{4} ,g)$ of neutral signature, which admits a ...
An indefinite Riemannian manifold is called neutral it its index is equal to one half of its dimensi...
Dedicated to the memory of Jerzy Plebański Abstract: Using twistor methods, we explicitly construct...
Abstract. I present a construction of real or complex selfdual conformal 4-manifolds (of signature (...
AbstractWe show that a natural class of twistorial maps gives a pattern for apparently different geo...
A study is made of algebraic curves and surfaces in the flag manifold $\mathbb{F}=SU(3)/T^2$, and th...
Abstract. I present a construction of real or complex selfdual conformal 4-manifolds (of signature (...
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