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1. CMB 2006 (vol 49 pp. 41)

Doeraene, Jean-Paul; El Haouari, Mohammed
The Ganea and Whitehead Variants of the\\Lusternik--Schnirelmann Category
The Lusternik--Schnirelmann category has been described in different ways. Two major ones, the first by Ganea, the second by Whitehead, are presented here with a number of variants. The equivalence of these variants relies on the axioms of Quillen's model category, but also sometimes on an additional axiom, the so-called ``cube axiom''.


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