Abstract
This paper is concerned with a study of some of the properties of locally product and almost locally product structures on a differentiable manifold X n of class Ck. Every locally product space has certain almost locally product structures which transform the local tangent space to X n at an arbitrary point P in a set fashion: this is studied in Theorem (2.2). Theorem (2.3) considers the nature of transformations that exist between two co-ordinate systems at a point whenever an almost locally product structure has the same local representation in each of these co-ordinate systems. A necessary and sufficient condition for X n to be a locally product manifold is obtained in terms of the pseudo-group of co-ordinate transformations on X n and the subpseudo-groups [cf., Theoren (2.1)]. Section 3 is entirely devoted to the study of integrable almost locally product structures.
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Communicated by Professor P. L. Bhatnagar,f.a.sc.
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Nagaraj, M. Note on the locally product and almost locally product structures. Proc. Indian Acad. Sci. 65, 270–282 (1967). https://doi.org/10.1007/BF03049534
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DOI: https://doi.org/10.1007/BF03049534