Znaleziono wyników: 4

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: vector bundle

Sortuj według:

Ogranicz wyniki do:

Vector bundles on Hirzebruch surfaces whose twists by a non-ample line bundle have natural cohomology

100%

Ballico E., Malaspina F.

Open Mathematics

2008

tom 6

nr 1

143-148

Here we study vector bundles E on the Hirzebruch surface F e such that their twists by a spanned, but not ample, line bundle M = $$ \mathcal{O} $$ Fe(h + ef) have natural cohomology, i.e. h 0(F e, E(tM)) > 0 implies h 1(F e, E(tM)) = 0.

On 2-distributions in 8-dimensional vector bundles over 8-complexes

75%

Čadek M., Vanžura J.

Colloquium Mathematicum

1996

tom 70

nr 1

25-40

It is shown that the $ℤ_2$-index of a 2-distribution in an 8-dimensional spin vector bundle over an 8-complex is independent of the 2-distribution. Necessary and sufficient conditions for the existence of 2-distributions in such vector bundles are given in terms of characteristic classes and a certain secondary cohomology operation. In some cases this operation is computed.

On 4-fields and 4-distributions in 8-dimensional vector bundles over 8-complexes

75%

Čadek M., Vanžura J.

Colloquium Mathematicum

1998

tom 76

nr 2

213-228

Let ξ be an oriented 8-dimensional spin vector bundle over an 8-complex. In this paper we give necessary and sufficient conditions for ξ to have 4 linearly independent sections or to be a sum of two 4-dimensional spin vector bundles, in terms of characteristic classes and higher order cohomology operations. On closed connected spin smooth 8-manifolds these operations can be computed.

Various structures in 8-dimensional vector bundles over 8-manifolds

75%

Čadek M., Vanžura J.

Banach Center Publications

1998

tom 45

nr 1

183-197

The paper is an overview of our results concerning the existence of various structures, especially complex and quaternionic, in 8-dimensional vector bundles over closed connected smooth 8-manifolds.

Ograniczanie wyników

2 Colloquium Mathematicum

1 Banach Center Publications

1 Open Mathematics

3 Vanžura J.

3 Čadek M.

1 Ballico E.

1 Malaspina F.

1 2008

2 1998

1 1996

Wyniki wyszukiwania

Vector bundles on Hirzebruch surfaces whose twists by a non-ample line bundle have natural cohomology

On 2-distributions in 8-dimensional vector bundles over 8-complexes

On 4-fields and 4-distributions in 8-dimensional vector bundles over 8-complexes

Various structures in 8-dimensional vector bundles over 8-manifolds