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VOLUME 44 (1986) | ISSUE 8 | PAGE 366
Comparison of topological aspects of gauge fixing in a string theory and a Yang-Mills theory
The topological obstacles to gauge fixing are fundamentally different in a string theory and in a Yang-Mills theory. In a string theory, the principal stratification, determined by the action of the group of diffeomorphisms, is reducible to a compact or discrete group, while in a non-Abelian theory the corresponding reduction is not possible.