Geometry of almost Cliffordian manifolds: classes of subordinated connections

An almost Clifford and an almost Cliffordian manifold is a G--structure based on the definition of Clifford algebras. An almost Clifford manifold based on O:= Cl (s,t) is given by a reduction of the structure group GL(km, R) to GL(m, O), where k=2s+t and m \in N. An almost Cliffordian manifold is given by a reduction of the structure group to GL(m, O) GL(1, O). We prove that an almost Clifford manifold based on O is such that there exists a unique subordinated connection, while the case of an almost Cliffordian manifold based on O is more rich. A class of distinguished connections in this case is described explicitly.

Geometry of almost Cliffordian manifolds: classes of subordinated connections

An almost Clifford and an almost Cliffordian manifold is a G--structure based on the definition of Clifford algebras. An almost Clifford manifold based on O:= Cl (s,t) is given by a reduction of the structure group GL(km, R) to GL(m, O), where k=2s+t and m \in N. An almost Cliffordian manifold is given by a reduction of the structure group to GL(m, O) GL(1, O). We prove that an almost Clifford manifold based on O is such that there exists a unique subordinated connection, while the case of an almost Cliffordian manifold based on O is more rich. A class of distinguished connections in this case is described explicitly.

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  • Alekseevsky, D. V., Marchiafava, S.: Quaternionic structures on a manifold and subordinated structures. Annali di Mat. Pura a Appl. 171, 205–273 (1996).
  • Burdujan, I.: On almost Cliffordian manifolds. Italian J. Pure Appl. Math. 13, 129–144 (2003).
  • Hrdina, J.: Notes on connections attached to A –structures. Diff. Geom. Appl. 29, Suppl. 1, 91–97 (2011).
  • Hrdina, J., Slov´ ak, J.: Generalized planar curves and quaternionic geometry. Glob. Anal. Geom. 29, 349–360 (2006). Hrdina, J., Vaˇ s´ık, P.: Generalized geodesics on some almost Cliffordian geometries. Balkan J. Geom. Appl., Vol. 17, 41–48 (2012).
  • Kobayashi, S.: Transformation Groups in Differential Geometry. Springer 1972.
  • Mikeˇ s, J., Sinyukov, N.S.: On quasiplanar mappings of spaces of affine connection. Sov. Math. 27, 63–70 (1983).