Roy Wang*Supervisor*: Marius Crainic*Thesis title:* On Integrable Systems & Rigidity for PDEs with Symmetry*Graduated on*: 13 september 2017 om 10:30 uur

Inan Ates*Supervisor*: Paul Zegeling*Thesis title:* Homotopy-Based Methods for Fractional Differential Equations *Graduated on*: 30 augustus 2017 om 14:30 uur

Ralph Klaase

Begeleiders: Gil Cavalcanti*Thesis title:* Geometric structures and Lie algebroids*Graduated on*: 29 augustus 2017 om 12:45 uur

Shan Shah*Advisors:* Erik van den Ban and André Henriques*Thesis title:* Bicoloured torus loop groups*Graduated on:* 15 March 2017 at 10:30 hour

Joey van der Leer Duran*Advisor:* Gil Cavalcanti*Thesis title:* Blow-Ups in Generalized Complex Geometry*Graduated on:* 30 November 2016 at 16:15 hour

Ori Yudilevich*Advisor:* Marius Crainic*Thesis title:* Lie pseudogroups à la Cartan from a modern perspective*Graduated on:* 14 September 2016 at 12:45 hour

Kan Jiang*Advisor:* Karma Dajani*Thesis title:* Expansions and dimensions*Graduated on:* 29 August 2016 at 14:30 hour

KaYin Leung*Advisor:* Odo Diekmann and Mirjam Kretzschmar*Thesis title:* Dangerous connections – the spread of infectious diseases on dynamic networks*Graduated on:* 27 June 2016 at 16:15 hour

Valentijn Karemaker*Advisor:* Gunther Cornelissen*Thesis title:* Hecke algebras, Galois representations, and abelian varieties*Graduated on:* 13 June 2016 at 14:30 hour

Viktor Blåsjö*Advisor:* Jan Hogendijk*Thesis title:* Transcendental Curves in the Leibnizian Calculus*Graduated on:* 22 February 2016 at 16:15 hour

João Mestre*Advisor:* Marius Crainic*Thesis title:* Differentiable stacks: stratifications, measures and deformations*Graduated on:* 17 February 2016 at 12:45 hour

Anshui Li*Advisor:* Tobias Müller*Thesis title:* Aspects of random geometric graphs: Pursuit-evasion and treewidth*Graduated on:* 4 December 2015 at 18:00 hour

Boris Osorno Torres*Advisor:* Marius Crainic*Thesis title:* Codimension-one Symplectic Foliations: Constructions and Examples*Graduated on:* 28 September 2015 at 16:15 hour

Sanjay Ramawadh*Advisor:* Roberto Fernandez*Thesis title:* On the Convergence of the Virial Expansion*Graduated on:* 1 July 2015 at 14:30 hour

Dali Shen*Advisor:* Eduard Looijenga*Thesis title:* Hyperbolic structures on a toric arrangement complement*Graduated on:* 4 February 2015 at 10:30 hour

Sebastian Klein*Advisor:* Gunther Cornelissen*Thesis title:* Chow groups and intersection products for tensor triangulated categories*Graduated on:* 29 September 2014 at 14:30 hour

Dana Balibanu*Advisors:* Erik van den Ban and Johan van de Leur*Thesis title:* Convexity theorems for symmetric spaces and representations of *n*-Lie algebras. Two studies in Lie theory*Graduated on:* 3 September 2014 at 12:45 hour

Jantien Dopper*Advisor:* Jan Hogendijk*Thesis title:* A life of learning in Leiden. The mathematician Frans van Schooten (1615–1660)*Graduated on:* 12 February 2014 at 16:15 hour

Bas Fagginger Auer*Advisor:* Rob Bisseling*Thesis title:* GPU Acceleration of Graph Matching, Clustering, and Partitioning*Graduated on:* 19 August 2013 at 16:15 hour

Esther Bod*Advisor:* Frits Beukers*Thesis title:* Algebraic *A*-hypergeometric functions and their monodromy*Graduated on:* 27 May 2013 at 16:15 hour

Maria Salazar Pinzon*Advisor:* Marius Crainic*Thesis title:* Pfaffian groupoids*Graduated on:* 24 May 2013 at 12:45 hour

Janne Kool*Advisor:* Gunther Cornelissen*Thesis title:* A combinatorial Li–Yau inequality and rational points on curves*Graduated on:* 8 May 2013 at 16:15 hour

Ioan Mărcuț*Advisor:* Marius Crainic*Thesis title:* Normal forms in Poisson geometry*Graduated on:* 11 February 2013 at 14:30 hour

Wouter Stekelenburg*Advisor:* Jaap van Oosten*Thesis title:* Realizability categories*Graduated on:* 14 January 2013 at 16:15 hour

Jan Jitse Venselaar*Advisor:* Gunther Cornelissen*Thesis title:* Classification and equivalences of noncommutative tori and quantum lens spaces*Graduated on:* 28 August 2012 at 14:30 hour

Jaap Eldering*Advisors:* Erik van den Ban, Hans Duistermaat and Heinz Hanßmann*Thesis title:* Persistence of noncompact normally hyperbolic invariant manifolds in bounded geometry*Graduated on:* 27 August 2012 at 16:15 hour

Bart van den Dries*Advisor:* Eduard Looijenga*Thesis title:* Degenerations of cubic fourfolds and holomorphic symplectic geometry*Graduated on:* 15 March 2012 at 10:30 hour

Jan Willem de Jong*Advisor:* Gunther Cornelissen*Thesis title:* Zeta function rigidity: A view from noncommutative geometry*Graduated on:* 24 October 2011 at 14:30 hour

Albert-Jan Yzelman*Advisor:* Rob Bisseling*Thesis title:* Fast sparse matrix–vector multiplication by partitioning and reordering*Graduated on:* 3 October 2011 at 16:15 hour

David Carchedi*Advisor:* Ieke Moerdijk*Thesis title:* Categorical properties of topological and differentiable stacks*Graduated on:* 13 September 2011 at 14:30 hour

Job Kuit*Advisor:* Erik van den Ban*Thesis title:* Radon transformation on reductive symmetric spaces: support theorems*Graduated on:* 16 May 2011 at 14:30 hour

Aleksandra Babenko*Advisors:* Eduard Belitser and Roberto Fernandez*Thesis title:* Oracle posterior rates in the White Noise Model*Graduated on:* 6 December 2010 at 10:30 hour

Andor Lukács*Advisor:* Ieke Moerdijk*Thesis title:* Cyclic operads, dendroidal structures, higher categories*Graduated on:* 27 October 2010 at 12:45 hour

Bas Janssens*Advisors:* Roberto Fernandez, Johan van de Leur and Hans Maassen*Thesis title:* Transformation & uncertainty: some thoughts on quantum probability theory, quantum statistics, and natural bundles*Graduated on:* 4 October 2010 at 14:30 hour

Jeroen Sijsling*Advisor:* Frits Beukers*Thesis title:* Equations for arithmetic pointed tori*Graduated on:* 30 August 2010 at 16:15 hour

Pavlo Negadailov*Advisor:* Roberto Fernandez, Alexander Gnedin and Alexander Iksanov*Thesis title:* Limit theorems for random recurrences and renewal-type processes*Graduated on:* 23 August 2010 at 12:45 hour

Vincent van der Noort*Advisor:* Erik van den Ban*Thesis title:* Analytic parameter dependence of Harish-Chandra modules for real reductive Lie groups – a family affair*Graduated on:* 21 December 2009 at 14:30 hour

Charlene Kalle*Advisors:* Karma Dajani and Richard Gill*Thesis title:* Expansions and Extensions: Ergodic, combinatorial and geometric properties of β-expansions with arbitrary digits*Graduated on:* 27 August 2009 at 10:30 hour

Arthur van Dam*Advisors:* Hendrik van der Vorst and Paul Zegeling*Thesis title:* Go with the Flow. Moving meshes and solution monitoring for compressible flow simulation*Graduated on:* 1 July 2009 at 14:30 hour

Tammo Jan Dijkema*Advisors:* Rob Stevenson and Hendrik van der Vorst*Thesis title:* Adaptive tensor product wavelet methods for the solution of PDEs*Graduated on:* 29 June 2009 at 14:30 hour

Jakub Byszewski*Advisor:* Gunther Cornelissen*Thesis title:* Cohomological aspects of equivariant deformation theory*Graduated on:* 18 May 2009 at 14:30 hour

Alexander Quintero Velez*Advisor:* Hans Duistermaat and Jan Stienstra*Thesis title:* Equivalence of D-brane categories*Graduated on:* 2 March 2009 at 12:45 hour

Camilo Arias Abad*Advisor:* Marius Crainic and Ieke Moerdijk*Thesis title:* Representations up to homotopy and cohomology of classifying spaces*Graduated on:* 8 December 2008 at 14:30 hour

Alex Boer*Advisor:* Eduard Looijenga*Thesis title:* A unitary structure for the graded quotient of conformal coblocks*Graduated on:* 12 November 2008 at 14:30 hour

Giorgio Trentinaglia*Advisor:* Ieke Moerdijk*Thesis title:* Tannaka Duality for Proper Lie Groupoids*Graduated on:* 17 September 2008 at 16:15 hour

Sander Dahmen*Advisor:* Frits Beukers*Thesis title:* Classical and modular methods applied to Diophantine equations*Graduated on:* 26 August 2008 at 12:45 hour

Oliver Lorscheid*Advisor:* Gunther Cornelissen*Thesis title:* Toroidal automorphic forms for function fields*Graduated on:* 28 May 2008 at 14:30 hour

Rogier Swierstra*Advisor:* Eduard Looijenga*Thesis title:* Moduli spaces of cubic hypersurfaces through a period map*Graduated on:* 28 April 2008 at 16:15 hour

Taoufik Bakri*Advisors:* Yuri Kouznetsov and Ferdinand Verhulst*Thesis title:* Averaged Behaviour of Nonconservative Coupled Oscillators*Graduated on:* 30 October 2007 at 14:30 hour

Ittay Weiss*Advisor:* Ieke Moerdijk*Thesis title:* Dendroidal sets*Graduated on:* 18 September 2007 at 14:30 hour

Barbara Boldin*Advisors:* Marc Bonten and Odo Diekmann*Thesis title:* Mathematical aspects of infectious disease dynamics*Graduated on:* 5 September 2007 at 12:45 hour

Erik Baurdoux*Advisors:* Erik Balder and Andreas Kyprianou*Thesis title:* Fluctuation theory and stochastic games for spectrally negative Lévy processes*Graduated on:* 4 September 2007 at 12:45 hour

Arno Swart*Advisor:* Leo Maas, Gerard Sleijpen and Hendrik van der Vorst*Thesis title:* Internal waves and the Poincaré equation*Graduated on:* 11 July 2007 at 12:45 hour

Joost Rommes*Advisor:* Hendrik van der Vorst*Thesis title:* Methods for eigenvalue problems with applications in model order reduction*Graduated on:* 25 June 2007 at 16:15 hour

Budhi Arta Surya*Advisors:* Richard Gill and Andreas Kyprianou*Thesis title:* Optimal Stopping Problems Driven by Lévy Processes and Pasting Principles*Graduated on:* 15 January 2007 at 14:30 hour

Pieter Eendebak*Advisor:* Hans Duistermaat*Thesis title:* Contact Structures of Partial Differential Equations*Graduated on:* 10 January 2007 at 12:45 hour

Hil Meijer*Advisors:* Yuri Kouznetsov and Ferdinand Verhulst*Thesis title:* Codimension 2 Bifurcations of Iterated Maps*Graduated on:* 4 December 2006 at 14:30 hour

Yaroslav Kondratyuk*Advisors:* Rob Stevenson and Hendrik van der Vorst*Thesis title:* Adaptive Finite Element Algorithms of Optimal Complexity*Graduated on:* 18 October 2006 at 12:45 hour

Tsogtgerel Gantumur*Advisors:* Hans Duistermaat and Rob Stevenson*Thesis title:* Adaptive wavelet algorithms for solving operator equations*Graduated on:* 9 October 2006 at 10:30 hour

Martin Bootsma*Advisors:* Marc Bonten and Odo Diekmann*Thesis title:* Mathematical studies of the dynamics of antibiotic resistance*Graduated on:* 23 May 2005 at 12:45 hour

Hoang Nguyen*Advisors:* Rob Stevenson and Hendrik van der Vorst*Thesis title:* Finite element wavelets for solving partial differential equations*Graduated on:* 18 April 2005 at 10:30 hour

Johnny Edwards*Advisor:* Frits Beukers*Thesis title:* Platonic Solids and Solutions to X² + Y³ = dZ^r*Graduated on:* 4 February 2005 at 10:30 hour

*Photos from June 2016 onwards by Gil Cavalcanti.*