571 zoekresultaten voor “group als” in de Publieke website
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The unit residue group
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.
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Groups and fields in arithmetic
Promotor: Prof.dr. H.W. Lenstra
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Expansions of quantum group invariants
In my research, we developed a method to distinguish knots. A knot is a mathematical depiction of the everyday knot that occurs in ropes and cords.
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Governance and Data Science Group
The extensive use of electronic communication channels and other devices has opened new possibilities for collecting data on human behavior. This information is sometimes openly accessible, but largely part of administrative registration systems that are not open to the broader public. The data provides…
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Intense automorphisms of finite groups
In this thesis we classify the pairs (p,G), where p is a prime number and G is a finite p-group possessing an intense automorphism, i.e. an automorphism that sends each subgroup of G to a G-conjugate, that is non-trivial and whose order is coprime to p.
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Random walks on Arakelov class groups
The main topic of this PhD thesis is the Arakelov ray class group of a number field, an algebraic object that contains both the ideal class group structure and the unit group structure.
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Inverse problems for universal deformation rings of group representations
Promotor: Prof.dr. P. Stevenhagen
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Profinite groups with a rational probabilistic zeta function
Promotores: H.W. Lenstra, A. Lucchini
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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.
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Terrorist Group Adaptation & Lessons for Counterterrorism (TERGAP)
Terroristische groepen passen zich aan veranderingen in hun omgeving aan om relevant te blijven. Dit project biedt nieuwe inzichten door een theorie over strategische doelwitselectie te ontwikkelen en big data-analyse en machine learning toe te passen om de hypothesen te testen.
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Group representations in Banach spaces and Banach lattices
Promotor: S.M. Verduyn Lunel, Co-promotores: M.F.E. de Jeu, B. de Pagter
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Collaboration in groups during teacher education
In dit proefschrift wordt verslag gedaan van vier studies waarin het samenwerken tussen docenten in opleiding (dio’s) onderzocht is. Samenwerking in de lerarenopleiding is belangrijk, omdat dit het leerproces van de dio’s tijdens de lerarenopleiding kan stimuleren en omdat ze zo voorbereid kunnen worden…
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Novel Protecting Group Strategies in the Synthesis of Oligosaccharides
The thesis focuses on synthesis strategies in oligosaccharide campaigns, and the influence of protecting groups.
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Principal algebraic actions of the discrete Heisenberg group
Promotor: Prof.dr. W.T.F. den Hollander
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Discriminatory punishment undermines the enforcement of group cooperation
Enforcement of group cooperation fails because of discriminatory punishment, according to research by Welmer Molenmaker and colleagues. When group members have different backgrounds, punishment turns into a double-edged sword: no longer used just to prevent group exploitation, but also to break the…
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On the 16-rank of class groups of quadratic number fields
Promotores: P. Stevenhagen, E. Fouvry (Univeriste Paris Saclay)
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Universal adelic groups for imaginary quadratic number fields and elliptic curves
Promotor: Prof.dr. P. Stevenhagen, Prof.dr. K. Belabas (Univ. de Bordeaux)
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Computational aspects of class group actions and applications to post-quantum cryptography
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…
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Related Party Transactions and Corporate Groups: When Eastern Europe Meets the West
Op 1 april 2020 verdedigde Ivan Romashchenko zijn proefschrift 'Related Party Transactions and Corporate Groups: When Eastern Europe Meets the West'. Het promotieonderzoek is begeleid door promotoren prof.mr. S.M. Bartman en prof. A. Radwan (Kaunas, Litouwen).
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Biographical Backgrounds and Radicalization Dynamics of Lone-Actor and Group-Based Terrorists
Waarom radicaliseert de ene persoon tot betrokkenheid bij terroristisch geweld binnen een groepscontext, terwijl de ander zich alleen aan deze vorm van geweld waagt? In dit artikel vergelijken Bart Schuurman en Sarah Carthy op basis van een nieuw ontwikkelde dataset terroristen in groepsverband en terroristen…
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Self-reliance crowds out group cooperation and increases wealth inequality
Hoe leidt zelfredzaamheid tot een afname in samenwerking voor publieke goederen?
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learning in higher education: design, implementation and evaluation of group learning activities
Samenwerkend leren in het hoger onderwijs: ontwerp, implementatie en evaluatie van groepsleeropdrachten
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Question’: The postcolonial dilemmas of three colonial mixed-ancestry groups compared
Waarom kozen sommige Euraziërs ervoor in de voormalige kolonie te blijven, terwijl anderen naar de metropool of een ander land vertrokken?
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Group benefits from genomic instability: a tale of antibiotic warriors in Streptomyces
Streptomyces are filamentous bacteria that produce more than two-thirds of known antibiotics.
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Knowledge Ethical, Legal and Technological Aspects of Data Mining and Group Profiling in Epidemiology
In de afgelopen jaren is het verzamelen en verwerken van tal van gegevens aanzienlijk toegenomen. Met behulp van nieuwe technologieën zoals data mining wordt getracht kennis te halen uit verzamelde gegevens. Vaak wordt gezocht naar profielen die eigenschappen of risico's van bepaalde groepen beschrijven.…
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Adapted deformations and Ekedahl-Oort stratifications of Shimura varieties
This thesis concerns the relation bettween the good reduction of Shimura varieties and the associated loop groups.
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Universitat de Lleida - Consolidated Medieval Studies Research Group - Seminar series
On Wednesday, 22 September, at 17.00, this interdisciplinary research group kicks off a series of online seminars.
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Nieuwe topic group ELS lab @Leiden over Goed Werkgeverschap
ELS lab @Leiden is op zoek naar collega’s die deel willen nemen aan de nieuwe topic group op Goed Werkgeverschap.
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Jorrit Rijpma bij Working Group on Frontex Scrutiny, Europees Parlement
Op vrijdag 23 april verscheen Jorrit Rijpma voor de Working Group on Frontex Scrutiny van het Europees Parlement. Deze werkgroep is opgericht door de Commissie burgerlijke vrijheden, justitie en binnenlandse zaken (LIBE) van het Europees Parlement, als reactie op de beschuldigingen van serieuze schendingen…
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Barend Mons appointed Chair of European Commission’s High Level Expert Group
Professor Barend Mons has been appointed Chair of the Commission High Level Expert Group
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Royal Astronomical Society eert team achter foto zwart gat met 2021 Group Achievement Award
De Event Horizon Telescope (EHT)-collaboratie ontvangt de 2021 Royal Astronomical Society Group Achievement Award. In april 2019 presenteerde het EHT-team de eerste foto van de schaduw van een zwart gat ooit. De Leidse hoogleraar Huib-Jan van de Langevelde is sinds vorig jaar directeur van EHT. Drie…
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Mariëlle Bruning lid van de Expert Group Violence Against Children van de Raad van Europa
Mariëlle Bruning, hoogleraar jeugdrecht, is namens Nederland verkozen tot lid van de Expert Group Responses to violence against children (CAHENF-VAC) welke is opgezet om de Ad Hoc Committee for the Rights of the Child (CAHENF) van de Raad van Europa te assisteren.
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Professor Matthias Haentjens benoemd in Expert Group van de Europese Commissie
Hoogleraar Financieel Recht Matthias Haentjens is recent benoemd tot lid van een Expert Group van de Europese Commissie over een Europees stelsel van conflictregels ten aanzien van effecten en vorderingen. Deze deskundigengroep heeft tot doel het bijstaan van de Commissie in haar werk om te komen tot…
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Chemical Synthesis of Fragments of Streptococcal Cell Wall Polysaccharides
This thesis describes the design and synthesis of fragments of various cell wall carbohydrates of the Streptococcus species, including the branched Group B-specific antigen (GBC) of Group B Streptococcus, glycerol phosphate (GroP) modified group A carbohydrate (GAC), and the O-acetylated type 1 capsular…
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gekozen tot lid van het coördinerende comité van de ESIL ‘Interest Group on the International Law of Culture’
In oktober werd Sophie Starrenburg gekozen tot lid van het coördinerende comité van de ESIL ‘Interest Group on the International Law of Culture’. Ze zal hierin samenwerken met Giovanni Carlo Bruno (Italian National Research Council), Andrzej Jakubowski (Polish Academy of Sciences) en Lucas Lixinski…
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Global Fields and Their L-functions
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.
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Diophantine equations in positive characteristic
In this thesis three different topics in number theory are studied.
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Synthesis of oligosaccharide libraries from GBS capsular polysaccharides for structure-based selection of vaccine candidates
Glycoconjugate vaccines are composed of microbial poly- or oligosaccharides covalently linked to a carrier protein.
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Class invariants for tame Galois algebras
Promotores: B. Erez, P. Stevenhagen, Co-Promotor: B. de Smit
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Managing group work (voertaal Engels)
Didactiek
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Jie HuWiskunde en Natuurwetenschappen
j.hu@cml.leidenuniv.nl | +31 71 527 2727
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Daan ScheepersFaculteit der Sociale Wetenschappen
scheepersdt@fsw.leidenuniv.nl | +31 71 527 3642
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Motivic invariants of character stacks
This thesis studies the geometry of representation varieties and character stacks. These are spaces parametrizing the representations of a finitely generated group, typically the fundamental group of a compact manifold, into an algebraic group G.
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Counting problems for number rings
Promotor: H.W. Lenstra
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Arithmetic of affine del Pezzo surfaces
In this thesis integral points on affine del Pezzo surfaces are studied.
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Gauss's theorem on sums of 3 squares, sheaves, and Gauss composition
Promotor: Bas Edixhoven, Promotor: Qing Liu
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Does knowledge of environmental performance change farmer's behaviour?
Does knowledge of environmental performance change farmer's behaviour?
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Group Care in the first 1000 days: the implementation of context- sensitive group care
Promotie
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Witnessing the Process of Bacterial Cell Death: Novel Antimicrobials and Their Mechanisms of Action
This thesis describes the antimicrobial discovery strategy developed in our group, the den Hertog Group at the Hubrecht Institute. It includes a cultivation-based screening approach for novel antimicrobial agents from the source of fungi, and a bacterial time-lapse imaging approach for antimicrobial…
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Computability of the étale Euler-Poincaré characteristic
Promotor: S.J. Edixhoven, L.D.J. Taelman