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)

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”.

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.

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.…

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

This thesis studies operator-algebraic aspects of subproduct systems, a generalization of product systems of Hilbert spaces.

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.

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.

Het Decoloniserend Collectief Leiden is een platform voor medewerkers en studenten die geïnteresseerd zijn in het verkennen van strategieën om pluralistische, diverse en gedekoloniseerde kennisproductie aan de Universiteit Leiden te bevorderen. Hoewel er veel dekoloniale discussies gaande zijn in afzonderlijke…

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

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

Promotor: G. J. Kroes

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

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.

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.

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?

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

In this Yearbook you will find some fascinating examples of what was done in 2021, not only by ourselves, but also by our international colleagues.

In this Yearbook you will find some fascinating examples of what was done in 2021, not only by ourselves, but also by our international colleagues.

Heterogeneous catalyzed processes are highly significant to the chemical industry. Dissociative chemisorption (DC) of molecules on surfaces is always considered as a step with a high degree of rate control for heterogeneous catalysis.

Europese burgers worden geconfronteerd met uitdagingen op het gebied van globalisering, migratie, technologische ontwikkelingen en klimaatverandering. Deze uitdagingen vergen het uiterste van onderlinge internationale en intergenerationele solidariteit, wat rechtstreeks betrekking heeft op de grondslagen…

Na de dekolonisatie van Indonesië kwamen tienduizenden migranten naar Nederland. Onderzoeker Liesbeth Rosen Jacobson vertelt er meer over in het radioprogramma ‘De Nacht van…’

One of the effects of climate change is the phenomenon of desertification, a process that occurs in semi-arid and arid areas and causes land degradation as well as vegetation loss. Due to the lack of resources, vegetation self-organizes to sustain itself by forming large-scale spatial patterns.

In dit project worden reisverslagen over Nederlands-Indië bestudeerd die zijn geschreven tussen 1800 en het einde van de Tweede Wereldoorlog. Door zowel Nederlandse reisteksten als inheemse reisteksten in het Javaans en Maleis te analyseren, wordt een nieuw, tweestemmig perspectief op (de geschiedschrijving…

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

In this thesis, we explore a Hochschild homology and cohomology-like notion for logarithmic schemes.

Most of current public-key cryptography is considered insecure against attacks from sufficiently powerful quantum computers. Post-quantum cryptography studies methods to secure information resistant against such attacks. One proposal is isogeny-based cryptography, which bases its security on computational…

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.

Promotor: S.J. Edixhoven

De eerste index om de veiligheid, duurzaamheid en circulariteit van producten te meten, waarmee ze het EU-kader (SSbD) operationaliseren.

Studievoorlichting

Een bloedige burgeroorlog teistert al jaren de Centraal-Afrikaanse Republiek. Promovendus Crépin Marius Mouguia wijst op een tragisch patroon: jongeren worden al generaties lang gerekruteerd als soldaat of strijder voor de rebellen. Ze hebben weinig alternatieven en houden zo de conflicten in stand.

Metals surfaces form a group of effective catalysts for the reaction of small molecules such as hydrogen (H2).

The unit residue group, to which the present thesis is devoted, is defined using the norm-residue symbol, which Hilbert introduced into algebraic number theory in 1897.

This thesis takes steps toward understanding the interaction between gas-phase and solid-state molecules in star- and planet-forming regions.

In this thesis, rational points on K3 surfaces are studied. In the first part of Chapter 1 the Brauer group and the the Brauer-Manin obstruction are introduced.

Promotoren: R. Tijdeman, A.K. Lenstra, Co-promotor: H.J.J. te Riele

Promotor: H.W. Lenstra