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In
Atiyah-Bott fixed point theorem
.
Definition
If E0, E1, ..., Ek are
smooth manifold
M (usually taken to be compact), then a
differential complex is a sequence
of
symbols
is exact outside of the zero section. Here π is the projection of the cotangent bundle T*M to M, and π* is the pullback of a vector bundle.
See also
References
Atiyah, M. F.; Singer, I. M. (1968). "The Index of Elliptic Operators: I". The Annals of Mathematics. 87 (3): 484. .