Chain extensions of D-algebras and their applications

Details Chain extensions of D-algebras and their applications Chain extensions of D-algebras and their applications

2003-11-21

arxiv.org/abs/math/0311372v1

Mathematics

Quantum Algebra

35 pages

Scientific paper

In order to unify the methods which have been applied to various topics such as BRST theory of constraints, Poisson brackets of local functionals, and certain developments in deformation theory, we formulate a new concept which we call the {\it chain extension} of a $D$-algebra. We develop those aspects of this new idea which are central to applications to algebra and physics. Chain extensions may be regarded as generalizations of ordinary algebraic extensions of Lie algebras. Applications of our theory provide a new constructive approach to BRST theories which only contains three terms; in particular, this provides a new point of view concerning consistent deformations. Finally, we show how Lie algebra deformations are encoded into the structure maps of an sh-Lie algebra with three terms.

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