Promotor: H.W. Lenstra, Jr., Co-promotor: B. de Smit

Promotor: K.E. Schalm, Co-promotor: S.S. Lee

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.

In this work we describe three methods to improve the performance of Quantum Field Theory calculations.

This dissertation is a collection of four research articles devoted to the study of Kummer theory for commutative algebraic groups.

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

Promotor: S.J. Edixhoven, Co-promotor: R.S. de Jong

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: Prof.dr. H.W. Lenstra

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

Promotor: R. Tijdeman

Het onderzoeksprogramma Probability Theory richt zich op kansrekening en op operationeel onderzoek.

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: S.J. Edixhoven

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

Het onderzoek binnen het Algebra, Geometry and Number Theory programma varieert van fundamentele wiskundige theorie tot algoritmes en toepassingen.

Promotor: H.W. Lenstra

In this thesis, we show that we can use Shimura’s CM theory to explicitly compute the Hilbert class field of any primitive quartic CM field.

Op 16 juni 2020 verdedigde Andrea Varga haar proefschrift 'Establishing State Responsibility in the Absence of Effective Government'. Het promotieonderzoek is begeleid door promotoren prof. dr. N.J. Schrijver en prof. dr. F. Baetens (University of Oslo).

In de masterspecialisatie Algebra, Geometry and Number Theory verbreed je je kennis van de zuivere wiskunde met onderwerpen als getaltheorie, algebraïsche meetkunde, algebraïsche topologie en cryptologie.

De masteropleiding Cultural Analysis: Literature and Theory van de Universiteit Leiden richt zich op de studie van literatuur vanuit een vergelijkend en theoretisch perspectief, en onderzoekt de literatuur van een breed spectrum van talen en culturen uit de hele wereld.

My PhD research is devoted to studies of the conjectural cluster-algebraic symmetry in the theory of topological string, which is the simplest, however already non-trivial sector in the theory of string.

The thesis mainly contributes to the characterization of Majorana fermions as they appear in the Condensed Matter context.

The thesis describes terrestrial field trials aimed to detect side-effects of pesticides within the framework of pesticide registration procedures. Field trials were developed using vascular plants Brassica napus and Poa annua, caterpillars Pieris brassicae and effects on decomposition were studied…

In deze masterspecialisatie houd je je bezig met twee kernthema’s in de politieke filosofie: legitimiteit en rechtvaardigheid. Je verdiept je in theoriën, methoden en complexe casus en maakt de stap van opinie naar analyse.

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

Geesteswetenschappen, Centre for the Arts in Society

Promotor: H.J.A. Röttgering, Co-promotor: M. Haverkorn

A management strategy has been developed for field margins to reduce pesticide drift to non-target areas and to promote biodiversity on arable land. To this end, 3 and 6 m wide strips along the edges of winter wheat, sugar beet and potato crops have been left unsprayed with herbicides and insecticides…

This thesis is is made of three parts. The first part describes a generalization of the Chabauty's method, that can be used to determine the rational points of a curve such that s+g>r+1, where g is the genusof the curve, r is the rank of the Mordell-Weil group of the jacobian of the curve and s is…

In deze studie onderzoeken we of 2-3-jarigen in staat zijn te anticiperen op het gedrag van een personage door rekening te houden met wat dit personage wel of niet weet over de situatie. Het kind zit op schoot en krijgt animaties te zien met twee personages, waarbij de ene zich verstopt en de andere…

This thesis is about cosmological inflation and its relation to observations.

Promotor: Prof.dr. P. Stevenhagen, Co-Promotor: J.H. Evertse

Promotor: J. Zaanen

Promotor: V. Vitelli, Co-promotor: J. Paulose

Op 16 april 2020 verdedigde Andrew Fink zijn proefschrift 'The Importance of Conspiracy Theory in Extremist Ideology and Propaganda'. Het promotieonderzoek is begeleid door promotor prof.dr. A. Ellian.

Welke kansen en bedreigingen vloeien voort uit de institutionele en normatieve diversiteit op het terrein van de rechten van de mens voor de effectieve bescherming van die rechten in een wereld die gekenmerkt wordt door pluralisme?

Promotor: Prof.dr. H.J.M de Groot, Co-Promotor: A. Alia

Systems with local constraints is a new finding in recent researches on complex systems. The heterogeneous spatial interactions and the temporal dependencies among those numerous units make it difficult to describe by traditional statistical physics.

The next generation of high-contrast imaging instruments on space-based observatories requires sophisticated wavefront sensing and control in addition to a high-performance coronagraph.

Promotor: S.J. Edixhoven Co-promotor: L. van Geemen, P. Parent

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

Kunst en vrije tijd, Kunst en vrije tijd

Promotores: T.H. Oosterkamp, N. de Jonge

The redox-conversion reaction of metal-disulfide and metal-thiolate complexes are important, as they may shed light on electron-transfer reactions that often occur in Nature.

Hoe kunnen we de mysteries van quantummaterie verklaren?

Freshwater and brackish water ecosystems are arguably the most vulnerable ecosystems on earth, due to concentrated human developments in and around them. The Pontocaspian (PC) region located at the border of Europe and Asia contains a variety of brackish water ecosystems and unique inhabitants, known…