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

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

‘We may have gone a bit overboard with protective legislation’. According to Bibi van den Berg, Professor Cybersecurity Governance at Leiden University, the sanctions that can be imposed when failing to report a data leak are so severe that organizations tend to cramp up when faced with a possible l…

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

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

Promotores: P. Stevenhagen, A. Enge Co-Promotor: T.C. Streng

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

Bruin

Promotor: H.W. Lenstra

The research of the Algebra, Geometry and Number Theory programme ranges from fundamental mathematical theory to algorithms and applications.

Promotor: S.J. Edixhoven

This thesis provides explicit expressions for the density functions of absolutely continuous invariant measures for general families of interval maps, that include random maps and infinite measure transformations, not necessarily number systems.

Promotor: Prof.dr. H.W. Lenstra

What is the relationship between probability experiments and cryptographic applications?

Knowledge and culture subproject 2:

Promotor: H.W. Lenstra

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

The research of the Algebra, Geometry and Number Theory cluster tries to bridge the gap between abstract theory and the world of algorithms and applications.

In July 2004, a cooperation started between the Faculty of Archaeology and the Museo del Hombre Dominicano and the (University College London, England, Dr. José Oliver), to explore the possibilities to jointly undertake archaeological investigations in the Dominican Republic.

Developing a method to simplify polynomials in complex curves

The master’s specialisation Algebra, Geometry and Number Theory at Leiden University is aimed at students who wish to acquire a profound knowledge of one of the areas within pure mathematics. There is a strong theme dealing with algebra and number theory as well as a strong theme dealing with topology…

Leiden Professor of Number Theory Manjul Bhargava has been awarded a Fields Medal, widely regarded as the Nobel Prize for Maths. Bhargava is a professor in Princeton, and since 2010 has also been the holder of the Stieltjes chair in Leiden.

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

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

Promotor: Prof.dr. A. Achucarro, Co-Promotor: J.W. van Holten

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

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.

Our cantilevers have a low intrinsic damping rate: this enables us to measure with low noise, since damping is proportionate to noise. However, when the magnet is close to the surface of a sample we want to study, we measure a much higher effective damping rate. This is caused by magnetic interaction…

Knowledge and culture subproject 2:

As every year the Faculty of Archaeology bioarchaeology group has visited Schöningen Germany for field research.

Since the adoption of agriculture people have cultivated fields. The project concerns all kinds of aspects related to raising crops.

Quantum critical metals at vanishing fermion flavor number.

Promotor: Prof.dr.ir. T.H. Oosterkamp, N. de Jonge

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

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 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.

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…

Promotores: W.J.G.M. Peijnenburg, G.R. de Snoo, Co-promotor: M.G. Vijver

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

This thesis describes the implementation and on-sky demonstration of high-resolution integral-field spectroscopy for extreme adaptive optics systems that are used to find and characterize exoplanets.

Science, Leiden Institute of Chemistry (LIC)

Governance and Global Affairs, Leiden University College The Hague

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…

Subproject of the NWO Smart Culture Grant research project 'The Critical Visitor'.

Governance and Global Affairs, Institute of Security and Global Affairs

We live in a data-drenched society awash with numbers. An inhabitant of the democratic polis of Athens (5th and 4th centuries B.C.E.) increasingly found himself surrounded by numerical data. This project aims to analyze the communicative functions and the political meaning(s) ascribed to these public…

This thesis investigates the relations between metabolism and anatomy through the use of Magnetic Resonance Imaging (MRI).

Science, Leiden Institute of Chemistry (LIC)