Case Closed | geodesic dome | Closed-circuit television | Frontier Closed Area | Closed-form expression | closed captioning | Comparison of open source and closed source | closed form | '''open''', '''semi-open''', and '''semi-closed''' | List of closed railway stations in Victoria | list of closed railway stations in Victoria | List of closed railway stations in Britain: K-L | Krasny Oktyabr Closed Joint-Stock Company | geodesic (general relativity) | Geodesic dome | geodesic | 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 | Closed for Business | Closed-eye hallucination | closed city | closed-circuit television | Closed captioning | closed | Close, Closed, Closure | Case Closed: The Phantom of Baker Street | Case Closed: The Last Wizard of the Century | Case Closed: Strategy Above the Depths | ASM Headquarters and Geodesic Dome |
Wilhelm Paul Albert Klingenberg (28 January 1924 Rostock, Mecklenburg, Germany – 14 October 2010 Röttgen, Bonn) was a German mathematician who worked on differential geometry and in particular on closed geodesics.