Michael Spivak: A Comprehensive Introduction to Differential Geometry. Volume 1.
Riemannian manifold | Case Closed | manifold | Closed-circuit television | Frontier Closed Area | Closed-form expression | closed captioning | Manifold | Differentiable manifold | Comparison of open source and closed source | closed form | 4-manifold | Stein manifold | Simplicial manifold | Riemann manifold | Piecewise linear manifold | '''open''', '''semi-open''', and '''semi-closed''' | Manifold Trilogy | List of closed railway stations in Victoria | list of closed railway stations in Victoria | List of closed railway stations in Britain: K-L | Leek and Manifold Valley Light Railway | Krasny Oktyabr Closed Joint-Stock Company | Finsler manifold | E8 manifold | Complex manifold | complex manifold | Closed sessions of the United States Senate | ''Closed on account of happiness.'' Two Danish resistance fighters are guarding a shop while the owner is celebrating the liberation of Denmark on 5 May 1945. The man on the left is wearing a captive German Stahlhelm | closed manifold |
Later Atiyah and Singer showed that index theorems for elliptic operators on closed manifolds with infinite fundamental group could naturally be phrased in terms of unbounded operators affiliated with the von Neumann algebra of the group.