Ieke Moerdijk's webpage

 Ieke Moerdijk

Ieke Moerdijk Izak (Ieke) Moerdijk studied Mathematics, Philosophy and General Linguistics at the University of Amsterdam. He received his PhD in Mathematics from the same institution in 1985, with the distinction Cum Laude. Subsequently he worked at the University of Chicago and at the University of Cambridge, before joining the Mathematics Department of Utrecht University in 1988. In 2011, he moved to Radboud University in Nijmegen. In 2016 he moved back to the University of Utrecht.

Moerdijk was awarded a Huygens Fellowship from NWO in 1986 and a PIONIER grant, again from NWO, in 1995. He was elected member of the KNAW (Royal Academy of Arts and Sciences) in 2006, and of the Academia Europaea in 2014. In 2011 Moerdijk received the Descartes-Huygens prize from the Académie des Sciences, and in 2012 the Spinoza Prize from NWO. He held visiting positions at Cambridge (St John's College), Montreal (McGill University), Sydney (University) and Aarhus, among others.

Moerdijk's research interests include algebraic and differential topology, and applications of topological structures in mathematical logic. He is the coauthor of several well-known books, including "Sheaves in Geometry and Logic" with S. Mac Lane (Springer Verlag, 1992, 1994), and "Introduction to Foliations and Lie Groupoids" with J. Mrcun (Cambridge UP, 2003). Currently, his main focus is on developing the theory of dendroidal sets.


Email address: i.moerdijk at

Personal assistant: c.lemette at

 Some lecture notes

Under this link, you will find some notes of various courses on subjects in algebraic topology taught earlier at Utrecht and in Nijmegen.

 Preprints and publications

Moerdijk's preprints can be found here, while most of his publications are here.

In addition, here are links to some unpublished papers, or papers which are otherwise hard to find:

 Some other material

  • Obituary of D(a)an Kan (in Dutch), published in the Levensberichten (obituaries) 2014 of the Dutch Royal Academy of Arts and Sciences.
  • Lecture presented at the Académie des Sciences on the occasion of the Descartes-Huygens Prize (2012).
  • Lecture on the occasion of the Dies Natalis in 2008 of Utrecht University (in Dutch).

 Some other activities

KAN lectures

  • 2015, 9-10 June, Michael Hopkins ‘Algebraic and Topological Vector Bundles’ .
  • 2016, 2-3 June, Graeme Segal, ‘The Ubiquity of Homotopy ’.
  • 2017, 1-2 June, Ib Madsen, ‘The Algebraic Topology of Diffeomorphism groups’, program.

European Autumn School in Topology, The Netherlands

Topology Day, September 27th, 2016.


Moerdijk is or was editor of the following journals and book series: