J 2019

C-projective symmetries of submanifolds in quaternionic geometry

BORÓWKA, Aleksandra Wiktoria and Henrik WINTHER

Basic information

Original name

C-projective symmetries of submanifolds in quaternionic geometry

Authors

BORÓWKA, Aleksandra Wiktoria (616 Poland) and Henrik WINTHER (578 Norway, guarantor, belonging to the institution)

Edition

Annals of Global Analysis and Geometry, Springer P.O. AH Dordrecht, Springer, 2019, 0232-704X

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10101 Pure mathematics

Country of publisher

Netherlands

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

Impact factor

Impact factor: 0.989

RIV identification code

RIV/00216224:14310/19:00108244

Organization unit

Faculty of Science

UT WoS

000463599800001

Keywords in English

c-projective structure; Quaternionic structure; Symmetries; Submaximally symmetric spaces; Calabi metric

Tags

Změněno: 3/4/2020 10:34, Mgr. Marie Šípková, DiS.

Abstract

V originále

The generalized Feix-Kaledin construction shows that c-projective 2n-manifolds with curvature of type (1,1) are precisely the submanifolds of quaternionic 4n-manifolds which are fixed-point set of a special type of quaternionic circle action. In this paper, we consider this construction in the presence of infinitesimal symmetries of the two geometries. First, we prove that the submaximally symmetric c-projective model with type (1,1) curvature is a submanifold of a submaximally symmetric quaternionic model and show how this fits into the construction. We give conditions for when the c-projective symmetries extend from the fixed-point set of the circle action to quaternionic symmetries, and we study the quaternionic symmetries of the Calabi and Eguchi-Hanson hyperkahler structures, showing that in some cases all quaternionic symmetries are obtained in this way.

Links

GBP201/12/G028, research and development project
Name: Ústav Eduarda Čecha pro algebru, geometrii a matematickou fyziku
Investor: Czech Science Foundation