On metrizability of locally homogeneous affine 2-dimensional manifolds

Vanžurová, Alena

Archivum mathematicum, Tome 49 (2013) no. 5, pp. 347-357

Abstract (VO)

In [19] we proved a theorem which shows how to find, under particular assumptions guaranteeing metrizability (among others, recurrency of the curvature is necessary), all (at least local) pseudo-Riemannian metrics compatible with a given torsion-less linear connection without flat points on a two-dimensional affine manifold. The result has the form of an implication only; if there are flat points, or if curvature is not recurrent, we have no good answer in general, which can be also demonstrated by examples. Note that in higher dimension, the problem is not easy to solve. Here we try to apply this apparatus to the two main types (A and B from [9], [1]) of torsion-less locally homogeneous connections defined in open domains of 2-manifolds. We prove that in dimension two a symmetric linear connection with constant Christoffels is metrizable if and only if it is locally flat. On the other hand, in the class of connections of type B there are even non-flat metrizable connections.

Détail

DOI : 10.5817/AM2013-5-347

Classification : 53B05, 53B20
Keywords: manifold; connection; metric

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