Differential Geometry of Manifolds

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Connections with parallel skew-symmetric torsion on sub-Riemannian manifolds

DOI
10.5922/0321-4796-2020-51-7
Pages
58-67

Abstract

On a sub-Riemannian manifold M of contact type, is considered an N-connection  defined by the pair (, N), where  is an interior metric connection,  is an endomorphism of the distribution D. It is proved that there exists a unique N-connection  such that its torsion is skew-symmetric as a contravariant tensor field. A construction of the endomorphism corresponding to such connection is found. The sufficient conditions for the obtained connection to be a metric connec­tion with parallel torsion are given.

Reference

1. Bukusheva, A. V.: Nonlinear connections and internal semi-pulverization on a distribution with a generalized Lagrangian metric. DGMF.
Kaliningrad. 46, 58—62 (2015).
2. Bukusheva, A. V.: The geometry of the contact metric spaces φ-connection. Scientific Bulletin of Belgorod State University. Ser. Mathematics. Physics, 17 (214):40, 20—24 (2015).
3. Bukusheva, A. V., Galaev, S. V.: Geometry of almost contact hyperkähler manifolds. DGMF. Kaliningrad. 48, 32—41 (2017).
4. Galaev, S.V.: On a sub-Riemannian manifold of contact type a connection. DGMF. Kaliningrad. 50, 68—81 (2019).
5. Gordeeva, I.A., Panzhensky, V.I., Stepanov, S.E.: Riemann — Cartan manifolds. Itogi nauki i tekhn. Sovrem. math. and its app. Theme reviews, 123, 110—141 (2009).
6. Agricola, I., Ferreira, A.C., Friedrich, Th.: The classification of naturally reductive homogeneous spaces in dimensions n  6 . Diff. Geom. Appl., 39, 59—92 (2015).
7. Alexandrov, B.: Sp(n)U(1)-connections with parallel totally skewsymmetric torsion. J. Geom. Phys., 57, 323—337 (2006).
8. Bukusheva, A.V., Galaev, S.V.: Almost contact metric structures defined by connection over distribution. Bull. of the Transilvania University of Brasov, Ser. III: Mathematics, Informatics, Physics, 4 (53):2, 13—22 (2011).
9. Cleyton, R., Swann, A.: Einstein metrics via intrinsic or parallel torsion. Math. Z., 247, 513—528 (2004).
10. Dileo, G., Lotta, A.: A note on Riemannian connections with skew torsion and the de Rham splitting. Manuscripta Math. 156:3-4, 299—302 (2018).
11. Friedrich, Th.: G2-manifolds with parallel characteristic torsion. Diff. Geom. Appl., 25, 632—648 (2007).
12. Galaev, S.V.: Admissible Hyper-Complex Pseudo-Hermitian Structures. Lobachevskii J. of Math., 39:1, 71—76 (2018).