Groupoids and pseudodifferential calculus on manifolds with corners

Spectral asymmetry and Riemannian Geometry. I

Michael Atiyah, V. K. Patodi, I. M. Singer · Mathematical Proceedings of the Cambridge Philosophical Society · 1975 · 2.1K citations

Natural Sciences, Physics, Descriptive Geometry +10

The Index of Elliptic Operators: I

Michael Atiyah, I. M. Singer · Annals of Mathematics · 1968 · 1.2K citations

Natural Sciences, Electrical Engineering, Algebra +8

The Longitudinal Index Theorem for Foliations

Alain Connes, Georges Skandalis · Publications of the Research Institute for Mathematical Sciences · 1984 · 367 citations · Full text

Natural Sciences, Earth Sciences, Geometry +9

Groupoids: unifying internal and external symmetry

Alan Weinstein · ArXiv.org · 1996 · 255 citations · Full text

Natural Sciences, Mathematics, Geometry +14

Pseudodifferential operators on differential groupoids

Victor Nistor, Alan Weinstein, Ping Xu · Pacific Journal of Mathematics · 1999 · 195 citations

Natural Sciences, Mathematics, Algebra +15