Expository Articles

• Kraft's classification of commutative group schemes killed by p over perfect fields of characteristic p
  
  
• The period matrices and theta functions of Riemann, in The Legacy of Bernhard Riemann after One Hundred and Fifty Years, eds. L. Ji, F. Oort and S.-T. Yau, International Press and Higher Education Press, 2016, pp. 79-106.
  
  
• Notes from a minicourse "Integral models of Shimura varieties", part of an instructive conference ``Advanced Courses on Arakelov Geometry and Shimura Varieties'' held at the Centre de Recerca Matematica (CRM), Barcelona, February 2006.
  
  
• Notes on Cartier Theory, (.pdf format)