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math.SP2011★ 5 cited
Perturbation of Sectorial Projections of Elliptic Pseudo-differential Operators
Bernhelm Booss-Bavnbek, Guoyuan Chen, Matthias Lesch +1
Over a closed manifold, we consider the sectorial projection of an elliptic pseudo-differential operator A of positive order with two rays of minimal growth. We show that it depend…
math.SP2010★ 3 cited
Basic Functional Analysis Puzzles of Spectral Flow
Bernhelm Booss-Bavnbek
We explain an array of basic functional analysis puzzles on the way to general spectral flow formulae and indicate a direction of future topological research for dealing with these…