Includes bibliographical references (pages 95-98).
ℱ-spaces and ℱ-maps -- ℱ-fibrations -- ℱ-lifting functions -- Categories of fibres -- ℱ-quasifibrations and based fibres -- Examples of categories of fibres -- The geometric bar construction -- Groups, homogeneous spaces, and Abelian monoids -- The classification theorems -- The definition and examples of [italic]Y-structures -- The classification of [italic]Y-structures -- A categorical generalization of the bar construction -- The algebraic and geometric bar constructions -- Transports and the Serre spectral sequence -- The group completion theorem.
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The basic theory of fibrations is generalized to a context in which fibres, and maps on fibres, are constrained to lie in any preassigned category of spaces [script capital] F. Then axioms are placed on [script capital] F to allow the development of a theory of associated principal fibrations and, under several choices of additional hypotheses on [script capital] F, a classification theorem is proven for such fibrations.