Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-26T01:29:19.850Z Has data issue: false hasContentIssue false

Fibrewise category

Published online by Cambridge University Press:  14 November 2011

I. M. James
Affiliation:
Mathematical Institute, 24–29 St. Giles, Oxford OX1 3LB, U.K
J. R. Morris
Affiliation:
Mathematical Institute, 24–29 St. Giles, Oxford OX1 3LB, U.K

Synopsis

The purpose of this paper is to introduce a fibrewise generalisation of category, in the sense of Lusternik–Schnirelmann. This reduces to the classical concept when the space is a point. Fibrewise category may be compared with equivariant category, which has been the subject of some recent research [1,7,8]. Many variations on the basic idea of category have been discussed in the literature, for example the concept of category of a map, but since the generalisations to the fibrewise case are fairly routine they are not considered here.

Type
Research Article
Copyright
Copyright © Royal Society of Edinburgh 1991

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1Fadell, E.. The equivariant Ljusternik-Schnirelmann method for invariant functions and relative cohomological index theories. In Méthodes Topologiques en Analyse Non-Lineaire, ed. Granas, A. (Montreal: University of Montreal Press, (1985) 4171.Google Scholar
2James, I. M.. A relation between Postnikov classes. Quart. J. Math. 67 (1966), 269280.CrossRefGoogle Scholar
3James, I. M.. The Topology of Stiefel Manifolds, (Cambridge: Cambridge University Press, 1976).Google Scholar
4James, I. M.. On category, in the sense of Lusternik-Schnirelmann. Topology 17 (1978), 331348.CrossRefGoogle Scholar
5James, I. M.. Fibrewise Topology (Cambridge: Cambridge University Press, 1989).CrossRefGoogle Scholar
6James, I. M.. Fibrewise co-Hopf spaces Glasnik Matematički (to appear).Google Scholar
7Marzantowicz, W.. A G-Lusternik-Schnirelmann category of space with an action of a compact Lie group. Topology 28 (1989), 403412.CrossRefGoogle Scholar
8Ramsay, J. R.. Extensions of Ljusternik-Schnirelmann category theory to relative and equivariant theories with an application to an equivariant critical point theorem. Topology Appl. 32 (1989), 4960.CrossRefGoogle Scholar
9Whitehead, G. W.. On mappings into group-like spaces. Comment. Math. Helv. 28 (1954), 320328.CrossRefGoogle Scholar