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 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…

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

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

A P300-based Brain Computer Interface character speller, also known as P300 speller, has been an important communication pathway, under extensive research, for people who lose motor ability, such as patients with Amyotrophic Lateral Sclerosis or spinal-cord injury because a P300 speller allows human-beings…

On the 15th of March, Orsat Ligorio succesfully defended his PhD-thesis and graduated. LUCL congratulates Orsat on this great result.

Why did 'character', 'habit', and 'virtue' serve as key terms in late 19th and early 20th-century scholarly correspondences, biographies, and obituaries? Why did scholars around 1900 display so much interest in the working habits and character traits of what they called the 'scholarly self'?

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

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: Prof.dr. E.F. Smets

Promotor: H.W. Lenstra

Textbooks in the Netherlands contain significantly fewer female than male characters and relatively few characters from a non-Western background. They also contain implicit stereotyping. This is what Judi Mesman, Professor of the Interdisciplinary Study of Societal Challenges at Leiden University, has…

Promotie

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.

Promotie

The research of the Mathematical Institute is driven by the curiosity of its members and has many internal and external connections. It can be characterised as fundamental but with an open attitude towards applications.

Ruobin Han defended her thesis on 21 March 2017

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

Promotor: Bas Edixhoven, Promotor: Qing Liu

Promotor: Prof.dr. P.C. van Welzen

Balsaminaceae is a diverse plant family characterized by a huge floral morphological diversity.

My artistic practice deals with documents and, more specifically, with the use and the exploration of their narrative potential.

Subproject of

Promotores: F.H.J. Redig, W.T.F. den Hollander

Trigonostemon Blume is a plant genus in the family Euphorbiaceae comprising 59 species.

Leiden is a real student city and has everything you’ll need to turn your time as a student into the time of your life.

Promotor: Prof.dr. E. Smets, Dr. M. Stech

On 2 September 2021, Gert Jan Geertjes defended his thesis 'Staatsrecht en conventie in Nederland en het Verenigd Koninkrijk'. The doctoral research was supervised by Prof. L.F.M. Verhey and Prof. W.J.M. Voermans.

How was the Scholarly Self cultivated in professorial families of the humanities, in German-speaking Europe between 1860 and 1930?

Can a virtual character’s friendly non-verbal responses stimulate eye-contact in individuals with varying levels of social anxiety?

This dissertation presents a new perspective on the life, work and character of the Dutch physical chemist Jacobus Henricus van ’t Hoff, first recipient of the Nobel Prize in Chemistry, and one of the most important and colourful scientists in Dutch history. The image of Van ’t Hoff that emerges from…

The images below give you a look through from phase 1 to phase 2A.

Prof.dr. P. Stevenhagen, Prof.dr. K. Belabas (Universite Bordeaux I)

It is often said that the true character of a person is only revealed in a crisis. In these days, the coronavirus causes concern about the true state of the multilateral system. Political scientist Gisela Hirschmann (Leiden University) is worried about the future of multilateralism.

Would it be possible for local and traditional European forms of parrhesiastic theater—by which Eleni Kamma means events, actions, and performances staged by characters who courageously speak their minds through scenes of excess and laughter, that take place in public view and incite the spectator’s…

Leiden is a lively university city, brimming with history and boasting a student life that’s tangible just about everywhere.

Leiden and The Hague are real student cities and has everything you’ll need to turn your time as a student into the time of your life.

The [a]social creatures lab focusses on understanding social interaction with and between artificial creatures.

The Leiden Academic Course Center offers various writing courses. Make your own reality when writing stories. You learn what a "good idea" is for a story or novel. You learn how to develop story lines and characters and how to develop your own style. At this moment we offer one writing course in English…

The [a]social creatures lab focusses on understanding social interaction with and between artificial creatures.

This project studies the roles of prehistoric foragers in past ecosystems to establish the character of past “natural” landscapes and enhance the management of current ones.

Teaching people to recognize subtle, real-world expressions will help them understand and trust others better. The aim of Mariska Kret is to develop an interactive virtual-reality training tool (E-VIRT) for a broad group of users, including patients. Kret provides a brief description of her idea for…

We always have several ongoing studies running in our labs. Below you can find information about each one.

The [A]Social Creatures Lab is an interdisciplinary research lab that focuses on understanding social interaction with and between artificial creatures. Researchers and students from the Media Technology group collaborate in it.

If you want to follow a full academic programme, the next step after obtaining your bachelor’s is a master’s degree (MA or MSc) at a Dutch or international university. And there may be no better place for your further master’s study than Leiden University!

Promotor: Erik F. Smets, Co-promotores: Barbara Gravendeel, Niels Raes

The Centre for Political Philosophy (CPP) at Leiden University is an interdisciplinary platform for political thought. It aims to bring together all those with an active interest in the field from different institutes, branches and fields of study at Leiden University.

On Thursday 16 November 2017, Lalin Kovudhikulrungsri defended her doctoral thesis entitled ‘The Right to Travel by Air of Persons with Disabilities’. The supervisors are Professor P.M.J. Mendes de Leon and Professor A.C. Hendriks.

How interest groups, differences in policy issues and institutional differences between countries affect whether public opinion is translated into policy?