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            |  |  
            | The Third Pillar of Science, Simons Foundation Lecture, February 17, 2021. |  
            | Structure Preservation in the Discretization of Partial Differential Equations, invited address at the Joint Math Meetings 2021, January 9, 2021. |  
            | Preserving Geometry in Numerical Discretization, CMSA Colloquium, Harvard University, December 2, 2020. |  
            | Complexes from Complexes, International Conference on Computational Mathematics and Scientific Computing, Chinese Academy of Sciences, August 18, 2020. |  
            | Wave Localization and its Landscape, Distinguished lecture in the natural sciences, Shanghai Jiaotong University, April 11, 2020. |  
            | Finite Element Exterior Calculus and Applications, Peking
            University/BICMR, August 15-18, 2015. |  
            | Part I      
                Part II      
                Part III      
                Part IV      
                Part V |  
            | Epilogue,
            SIAM Past President's Address, Minneapolis, July 11, 2012; highlights. |  
            | Ten Lectures on Finite Element Exterior
            Calculus, NSF/CBMS course, ICERM, June 11-15, 2012. |  
            | Finite Element Differential Forms
            on Simplices and Cubes, conference in the memory of J-L Lions, Fudan
            University, May 31, 2012. |  
            | Mathematics that Swings: the Math Behind
            Golf, the 2010 Maseeh Lecture, Portland State, May 11, 2010. |  
            | Fifty years of Whitney elements,
            Colloquium on the 50th anniversary of the journal Numerische
            Mathematik, Munich, June 16, 2009. |  
            | Stability, Consistency, and
            Convergence: Modern Variations on a Classical Theme, Distinguished Feng
            Kang Lecture given at the Chinese Academy of Sciences, April 7, 2009. Similar
            talk given as the joint AMS-MAA lecture at the Joint Math Meetings,
            Washington, DC, January 2009. |  
            | Finite element differential forms,
            this version from April 2009 given at the Institute for Computational
            Mathematics and Science/Engineering Computing, Chinese Academy of
            Sciences. |  
            | Finite element exterior calculus and the
            geometrical basis of numerical stability, this version from April 2009,
            given at Tsinghua University, Beijing and Fudan University, Shanghai. |  
            | Finite element exterior calculus: A new
            approach to the stability of finite elements, plenary talk at the 9th
            U.S. National Congress on Computational Mechanics, San Francisco, July 25,
            2007. |  
            | Differential complexes and mixed finite
            elements for elasticity, workshop on Compatible Discretizations for PDE,
            Centre of Mathematics for Applications, Oslo, Norway, September 26,
            2005. |  
            | Mathematics and the cosmos in the
            Einstein centenary: The new mathematical gravitational astronomy, Bullitt
            Lecture, University of Louisville, April 28, 2005. |  
            | Mathematics in a dangerous time, Keynote
            address for an Applied Math Workshop at University of Illinois, May 7,
            2003. |  
            | From exact sequences to colliding black
            holes: Differential complexes in numerical analysis, Plenary address at
            ICM 2002, the International Congress of Mathematics, Beijing, 2002. |  
            | Numerical relativity, ICM 2002 Satellite
            Conference on Nonlinear PDE: Theory and Approximation, Hong Kong, August 30,
            2002. |  
            | Mixed finite elements for elasticity,
            ICM 2002 Satellite Conference on Scientific Computing, Xi'an, August 16,
            2002. |  
            | A quick introduction to the Einstein
            equations, tutorial delivered at the IMA workshop on Numerical
            Relativity, June 24, 2002. |  
            | Mathematics in industry, presentation
            delivered at the NSF VIGRE meeting, Reston, VA, May 4, 2002. |  
            | Approximation by quadrilateral finite
            elements, Sandia National Laboratory, Albuquerque, NM, February 19,
            2002. |  
            | Questions on shell theory workshop on
            "Elastic Shells: Modeling, Analysis, and Computation", Mathematical Sciences
            Research Institute, Berkeley, CA, April 21, 2000. |  |