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Non-Abelian Homological Algebra and Its Applications (Paperback, Softcover reprint of hardcover 1st ed. 1997)
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Non-Abelian Homological Algebra and Its Applications (Paperback, Softcover reprint of hardcover 1st ed. 1997)
Series: Mathematics and Its Applications, 421
Expected to ship within 10 - 15 working days
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While in classical (abelian) homological algebra additive functors
from abelian (or additive) categories to abelian categories are
investigated , non- abelian homological algebra deals with
non-additive functors and their homological properties , in
particular with functors having values in non-abelian categories.
Such functors haveimportant applications in algebra, algebraic
topology, functional analysis, algebraic geometry and other
principal areas of mathematics. To study homological properties of
non-additive functors it is necessary to define and investigate
their derived functors and satellites. It will be the aim of this
book based on the results of researchers of A. Razmadze
Mathematical Institute of the Georgian Academy of Sciences devoted
to non-abelian homological algebra. The most important considered
cases will be functors from arbitrary categories to the category of
modules, group valued functors and commutative semigroup valued
functors. In Chapter I universal sequences of functors are defined
and in- vestigated with respect to (co)presheaves of categories,
extending in a natural way the satellites of additive functors to
the non-additive case and generalizing the classical relative
homological algebra in additive categories to arbitrary categories.
Applications are given in the furth- coming chapters. Chapter II is
devoted to the non-abelian derived functors of group valued
functors with respect to projective classes using projective pseu-
dosimplicial resolutions. Their functorial properties (exactness,
Milnor exact sequence, relationship with cotriple derived functors,
satellites and Grothendieck cohomology, spectral sequence of an
epimorphism, degree of an arbitrary functor) are established and
applications to ho- mology and cohomology of groups are given.
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