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math.KT2001
Index defects in the theory of nonlocal boundary value problems and the eta invariant
A. Savin, B. Sternin
We study elliptic theory on manifolds with boundary represented as a covering space. Firstly, we consider boundary value problems, where the boundary conditions are allowed to mix…
math.KT2000
The Eta-invariant and Pontryagin duality in K-theory
A. Yu. Savin, B. Yu. Sternin
The topological significance of the spectral Atiyah-Patodi-Singer eta-invariant is investigated under the parity conditions of P. Gilkey. We show that twice the fractional part of…