616 search results for “geometric singular perturbation theory” in the Public website

Patterns in natural systems
Promotor: A. Doelman, Copromotores: P.J.A. van Heijster; A. Zagaris

Geometry of Vegetation Pattern
One of the effects of climate change is the phenomenon of desertification, a process that occurs in semiarid and arid areas and causes land degradation as well as vegetation loss. Due to the lack of resources, vegetation selforganizes to sustain itself by forming largescale spatial patterns.

Pulses in singularly perturbed reactiondiffusion systems
Promotor: Arjen Doelman, Copromotor: Vivi Rottschäfer

Lines in the sand: behaviour of selforganised vegetation patterns in dryland ecosystems
Vast, often populated, areas in dryland ecosystems face the dangers of desertification.

Geometric quadratic Chabauty and other topics in number theory
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 MordellWeil group of the jacobian of the curve and s is…

Geometric phases in soft materials
Geometric phases lead to a nontrivial interference result when an electron's different quantum mechanical paths choices encircle a magnetic coil in an AharonovBohm experiment.

Waves and Patterns in Discrete Media: Bridging the Gaps
What happens to electrical waves that have to cross gaps in insulation material around nerves in the human body

Geometric approach to evolution problems in metric spaces
Promotor: S.M. Verduyn Lunel, Copromotor: O.W. van Gaans

Geometry in ornament: On the history, theory and science about the presumed universality of geometrical patterns and its cognitive foundation
Knowledge and culture subproject 3:

Abstract patterns and representations: the recognition of geometric ornament
On May 17th, Arthur Crucq succesfully defended his doctoral thesis and graduated. The Leiden University Centre for Linguistics congratulates Arthur on this great result.

Periodic pulse solutions to slowly nonlinear reactiondiffusion systems
Promotor: A. Doelman, Copromotor: J.D.M. Rademacher

Morphodynamic equilibria in tidal inlet systems: sensitivity to geometrical variations
A tidal basin is an inland sea which is almost entirely enclosed by land and connected to the open sea by a tidal inlet. Through the tidal inlets interaction takes place between the tidal basin and the open sea.

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

Inflation, Adiabaticity and the Speed of Sound of the Curvature Perturbations
Promotor: A. Achúcarro, CoPromotor: G.A. Palma

Counting points on K3 surfaces and other arithmeticgeometric objects
This PhD thesis concerns the topic of arithmetic geometry. We address three different questions and each of the questions in some way is about counting how big some set is or can be.

Probability theory
The research programme Probability Theory focuses on probability theory and on operations research.

Theory
Many important topics in computer science, such as the correctness of software, the efficiency of algorithms and the modeling of complicated systems, depend on sound theoretical underpinnings. In the Theory group, we study these fundamental building blocks and develop verification methods to prove system…

Theory
Many important topics in computer science, such as the correctness of software, the efficiency of algorithms and the modeling of complicated systems, depend on sound theoretical underpinnings. In the Theory group, we study these fundamental building blocks and develop verification methods to prove system…

Concrete arithmetic between geometry and number theory
Bruin

Key Issues in Historical Theory
This book addresses the definition of history and how people are influenced by it.
 Diplomatic Theory

Mersenne primes and class field theory
Promotor: H.W. Lenstra, Jr., Copromotor: B. de Smit

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

Primitivism and architectural theory
Subproject of

Modular curves, Arakelov theory, algorithmic applications
Promotor: S.J. Edixhoven, Copromotor: R.S. de Jong
 Econophysics & Network Theory

Algebra, Geometry and Number Theory
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.

The Death of Archaeological Theory
The Death of Archaeological Theory, edited by John Bintliff and Mark Pearce, addresses the provocative subject of whether it is time to discount the burden of somewhat dogmatic theory and ideology that has built up over the last 25 years.

Faster number theory, safer cryptography
Developing a method to simplify polynomials in complex curves

Theorie van fermionpariteitomkeringen in supergeleiders
Majorana meets a mermaid

On the randommatrix theory of Majorana fermions in topological superconductors
The thesis mainly contributes to the characterization of Majorana fermions as they appear in the Condensed Matter context.

Algebra, Geometry and Number Theory (MSc)
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…

Sentencing: theory and practice
Sentencing is becoming increasingly complex for the courts. Legal scholars and criminologists from Leiden document the process of sentencing in the Netherlands. They use this knowledge to advise legislators and those who implement this legislation on how to make sentencing more consistent and effect…

The Oxford Handbook of Morphological Theory
Edited by linguists Jenny Audring (Leiden University) and Francesca Masini (University of Bologna), this is a unique handbook with a focus on morphology theories rather than morphological data. It covers a wide array of morphological theories, from traditional twentieth century models to current theoretical…

Jan Zaanen Group (Quantum Matter Theory)
The focus of our theoretical physics research is the nature of macroscopic matter that is in one or the other way still in the grip of quantum physics.

Koenraad Schalm Group (String Theory and Experiment)
Truth is stranger than fiction. In 1997 Juan Maldaceña discovered a remarkable dictionary that translates equation for equation the physics of black holes in string theory into the more conventional physics of quantum mechanics of interacting particles. The remarkable possibility exists that…

Political Theory: Legitimacy and Justice (MSc)
This political theory specialisation focuses on the concepts of legitimacy and justice—political philosophy’s core themes. Immersing yourself in theories, philosophical and theoretical methods, and complex cases, you will make the leap from opinion to analysis.

Cultural Analysis: Literature and Theory (MA)
The master in Cultural Analysis: Literature and Theory at Leiden University focuses on the study of literature from a comparative and theoretical perspective, with a special emphasis on literary movements and genres of the 19th, 20th, and 21st centuries. It covers a wide range of languages and cultures…

Hunting for new physics in the primordial Universe
This thesis contributes to studying primordial cosmology theories and their detectability in future observations.

Patterns on Spatially Structured Domains
We consider the propagation of electrical signals through nerve fibres.

Deciphering fermionic matter: from holography to field theory
Promotor: K.E. Schalm, Copromotor: S.S. Lee

Politics of Withdrawal Media, Arts, Theory
'Politics of Withdrawal' considers the significance of practices and theories of withdrawal for radical thinking today.

Transport coefficients and low energy excitations of a strongly interacting holographic fluid
In this thesis, classes of strongly interacting quantum field theories, have been studied.

University Lecturer in Historical Theory / General History
Humanities, Institute for History

International Humanitarian Law in Theory and Practice
The Summer School on International Humanitarian Law is designed by the Grotius Centre KalshovenGieskes Forum on International Humanitarian Law. Information about the next edition will be published in January 2023.

Memory: concepts and theory
The terms ‘social’ , ‘collective’ or ‘public’ memory, are often contrasted with ‘private’, ‘individual’ or ‘personal’ memory. All these terms derive from a fairly new and interdisciplinary scholarly field that is often referred to as ‘memory studies’, and that according to some critics has developed…

Diego Garlaschelli Group (Econophysics and Network Theory)
We study the structure, dynamics and physics of complex networks emerging from the intricate interconnectedness of the constituents of large systems.

Gauge theory and nematic order : the rich landscape of orientational phase transition
Promotor: J. Zaanen

Landscape Theory: Post68 Revolutionary Cinema in Japan
On the 28th of September Go Hirasawa successfully defended a doctoral thesis and graduated.

Theoryenriched practical knowledge in mathematics teacher education
This study looks at the question of how and at what level students in primary teacher education can integrate theory and practice, and how the organisation of their learning environment, focusing especially on mathematics and pedagogy, can contribute to that.