Lectures and papers in English

• The Geometry of Manifolds and the Perception of Space (April 25, 2016)
• Geometry in the Age of Enlightenment (July 23, 2015)
• The Origins of Complex Geometry in the 19th Century (April 16, 2015)
• Key Developments in Geometry in the 19th Century (January 3, 2015)
• Rotary Bremen-Roland Lecture in honor of Howard Resnikoff (January 15, 2010)
• Academic Cooperation between Bremen and America (November 4, 2009)
• Rotaract Club Bremen Lecture: What is the significance of Barack Obama’s Election? (December 8, 2008)
• Manifolds and Euclidean Space (November 17, 2008)
• Founders Day Speech (October 29, 2007)
• Twenty Years of RUSMP (September 8, 2006)
• Farewell Speech IUB (October 20, 2005)
• IUB Class of 2005 Speech (June 3, 2005)
• Speech for Graduate Student Association at IUB (October 22, 2004)
• Introduction of speakers on the 175th Anniversary of Carl Schultz (March 4, 2004)
• Wavelet Analysis: An Overview and Perspectives (December 4, 2003)
• New Legal Structures and Financial Challenges: International University Bremen (September 6, 2002)
• Algebraic Structures of Wavelet Analysis (January 4, 2001)
• The Geometry and Analysis of Wavelet Systems (May 25, 2000)