Ice, the solid state of water, plays an important role on our planet as well as the entire universe.Despite the fact that an individual water molecule has a very simple structure, its chemical bonding in the solid phase can be surprisingly complex.

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

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.

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.

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

Let A be a commutative algebraic group over a field K, and let G be a finitely generated subgroup of the K-rational points of A. The purpose of this thesis is to study the degrees of the Kummer extensions relative to A,K and G.

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

'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.

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…

Op 7 september verdedigde Francesc Claret Traid het proefschrift 'On the nature of the right to resist: a rights-based theory of the ius resistendi in liberal democracies'. Het promotieonderzoek is begeleid door Afshin Ellian en Gelijn Molier.

Op 23 oktober 2019 verdedigde Yoram Stein zijn proefschrift 'Spinoza's Theory of Religion: The Importance of Religion in Spinoza's Thought and Its Implications for State and Society'. Het promotieonderzoek is begeleid door promotor prof.dr. P.B. Cliteur en prof.dr. A.A.M. Kinneging.

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

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

Deze scriptie onderzoekt de complexiteit van wetsbesluiten binnen de EU, met een specifieke focus op de Raad van de EU.

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.

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

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

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.

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

Wat is de dreiging van IS op dit moment? Edwin Bakker, Hoogleraar Terrorisme en Contraterrorisme van het Institute of Security and Global Affairs (ISGA) was te gast bij het actualiteitenprogramma Pauw.

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.

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

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

Daan Weggemans, CTC onderzoeker van de Universiteit Leiden, was te gast bij het BNN programma

Op de 447e verjaardag van de universiteit, op 8 februari 2022, was het dagthema van Leiden2022 ‘447’. Annetje Ottow, voorzitter van het College van Bestuur, was die dag te gast bij Radio Weetlust. Dit radioprogramma wordt tijdens Leiden2022 dagelijks uitgezonden op Sleutelstad FM. Verschillende Leidse…

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…

To an algebraic curve C over the complex numbers one can associate a non-negative integer g, the genus, as a measure of its complexity.

Promotor: Prof.dr. P. Stevenhagen, Prof.dr. K. Belabas (Univ. de Bordeaux)

In this thesis,

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”.

Op 19 december 2019 verdedigde Reza Eftekhar zijn proefschrift 'The Role of the Domestic Law of the Host State in Determining the ratione materiae Jurisdiction of Investment Treaty Tribunals: The Partial Revival of the Localisation Theory'. Het promotieonderzoek is begeleid door promotor prof.dr. E.…

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

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

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.

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

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

Promotor: Robert Tijdeman, Co-promotor: Cornelis Kraaikamp

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.

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

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

Promotor: Prof.dr. C.W.J. Beenakker

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

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.

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