Arithmetic geometry concerns the number-theoretic properties of geometric objects defined by polynomials. Mathematicians are interested in the rational solutions to these geometric objects.

Between the early thirteenth and early sixteenth centuries CE, the Sultanate of Cairo affected the balances of power elites across and beyond the regions of Egypt, Syria and the Eastern Mediterranean. Modern historiography has for a long time been determined by the idea of this sultanate as a highly…

Op donderdag 29 februari bezocht Wojciech Wiewiórowski, de Europese Toezichthouder voor Gegevensbescherming, het eLaw Center for Law and Digital Technologies aan de Faculteit der Rechtsgeleerdheid om een lezing te geven met de titel ‘Fundamental rights and/or market surveillance: the current and future…

This thesis consists of three chapters, the first two of which concern division points of elements of the multiplicative group of a number field.

This thesis consists of three chapters. Each chapter is on a different subject. However, all three chapters address issues that arise in counting arithmetically interesting objects.

Promotor: W.Th.F. den Hollander, Co-promotor: F.R. Nardi

This thesis studies the geometry of representation varieties and character stacks. These are spaces parametrizing the representations of a finitely generated group, typically the fundamental group of a compact manifold, into an algebraic group G.

"To see, to hear, to touch, to kiss, and so on: Dealing with charters in the early Middle Ages." Guest lecture by Prof. Dr. Philippe Depreux (University of Hamburg): Tuesday 9 May 2023, 15.00-16.30

'Ik stond vorig jaar in Nature, ik was genomineerd voor de facultaire prijs voor docent van het jaar; het liet mijn kinderen allemaal koud. Maar als je simulaties in The Big Bang Theory verschijnen, dan is het ineens wat anders! ’ aldus Huib van Langevelde.

Op 11 februari 2016 zal Wim Mijs de tiende Hazelhoff Guest Lecture verzorgen, getiteld ‘Een toekomst zonder banken?’. Wim Mijs is Chief Executive van de Europese Bankenfederatie (EBF) en alumnus van Universiteit Leiden.

In this thesis, classes of strongly interacting quantum field theories, have been studied.

Vincenzo Vitelli is per 1 juni 215 benoemd tot hoogleraar Theory of Condensed Matter.

DNA carries various forms of information. Out of these forms of information the most well-known is classical genetic information.

This thesis explores Breaking of Ensemble Equivalence (BEE) in random graph models by examining the spectral properties of adjacency matrices. The goal is to identify spectral characteristics that differentiate random graph ensembles, enhancing the understanding of complex network structures and beh…

Promotor: W.Th.F. den Hollander Co-Promotor: F.M. Spieksma

In this article, Jasmijn Boeken, explores in which ways the defining characteristics of the different zones can be found in the digital sphere.

Organic molecules in interstellar space are important as they influence the structure of galaxies and star formations. Studying catalytic processes in space allows us to understand how molecular species are formed and chemically evolved in the interstellar medium and solar system objects.

How does one become a guest author for Nobel Prize winner Dr. Denis Mukwege Foundation? One of our alumni, Mariasole Forlani, can tell you all about it.

Wim Mijs, Chief Executive van de Europese Bankenfederatie (EBF) reflecteerde 11 februari 2016 op de vraag 'Een toekomst zonder banken?' tijdens de tiende Hazelhoff Guest Lecture.

Promotor: S.J. Edixhoven

Een interdisciplinaire culturele analyse van de manier waarop de Hindoestaanse dubbele migratie hedendaagse identificatieprocessen beïnvloedt en de juxtapositie van traditie en moderniteit problematiseert.

This dissertation focused on computational methods based on first principles calculations using the Density Functional Theory (DFT) framework. Emphasis was laid on affordable methods that can provide a tradeoff between computational expense and accuracy.

Promotor: Prof.dr. P. Stevenhagen, Jan-Hendrik Evertse, Co-promotor: Pascal Autissier

Promotor: P. Stevenhagen, Co-promotor: R.M. van Luijk

Promotor: F. Arbab, R. De Nicola, Co-Promotor: M. Tribastone

Promotor: A. Doelman, Co-promotores: P.J.A. van Heijster; A. Zagaris

In het nieuwste nummer van het blad ‘The Theory and Practice of Legislation’ staat een bijdrage van Jelle But, Demy Jongkind en Wim Voermans.

Promotor: A. Achúcarro, Co-Promotor: J.W. van Holten

In this thesis we study the landscape of gravitational models which modify GR by introducing an additional scalar degree of freedom (d.o.f.) to source Cosmic Acceleration.

Heterogeneous catalysis is one of the fundamental processes of modern life, being common in industrial refinery and hydrogen vehicles, all the way to the living cell. The dissociation of H2 on Cu(111) is an important benchmark system for studying heterogeneous catalysis, with a large and varied amount…

Professor Edwin Bakker, directeur van het Centrum voor Terrorisme & Contraterrorisme heeft zijn nieuwe boek getiteld 'Terrorism and Counterterrorism Studies: Comparing Theory and Practice' bij Leiden University Press uitgebracht.

This thesis is dedicated to the exploration of the primordial dark ages: unknown physics during the earliest stages of the Universe’s expansion that have not yet been directly probed by observations. Cosmic inflation is a burst of exponential expansion of space after the “Big Bang”.

In this thesis,

Artin L-functions associated to continuous representations of the absolute Galois group G_K of a global field K capture a lot of information about G_K as well as arithmetic properties of K.

Promotor: Ronald Cramer, Co-promotor: Serge Fehr

Promotor: Robert Tijdeman, Co-promotor: Cornelis Kraaikamp

Promotor: A. Doelman, Co-promotor: M.F.E. de Jeu

This thesis contributes to studying primordial cosmology theories and their detectability in future observations.

Fundamental understanding of molecular reactions on metal surfaces is important for improving heterogeneous catalysis.

Promotor: S.M. Verduyn Lunel, Co-Promotor: O.W. van Gaans

Dissociative chemisorption is an important reaction step in many catalytic reactions.

Promotor: G. J. Kroes

In this thesis, we consider various (electro)chemical phenomena at surfaces and nanoparticles and their underlying atomistic processes, which we studied using first-principles methods such as density functional theory.

The work in this thesis demonstrates how to obtain an atomic-scale picture of a diverse set of complex surface structures observed using STM, under disparate conditions.

The overarching clinical aim of this thesis was to improve pharmacological pain management by characterizing the pharmacodynamics of analgesics. This promotion has been awarded the predicate cum laude.

Promotores: P. Stevenhagen, E. Fouvry (Univeriste Paris Saclay)

Waarom spraken negentiende-eeuwse wetenschappers zo graag over toewijding, vlijt en ijver? Waarom wijdde Robert Fruin zijn oratie aan onpartijdigheid en riep Abraham Kuenen zijn studenten op tot waarheidsliefde?

Chapter 1,contains the numerical verification of the Birch and Swinnerton-Dyer conjecture for hundreds of Jacobians of hyperelliptic curves of genus 2, 3, 4 and 5.

Promotores: C. J. ten Cate; M. A. Ainslie. Co-promotor: W. Slabbekoorn