726 zoekresultaten voor “groups” 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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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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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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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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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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On the 16-rank of class groups of quadratic number fields
Promotores: P. Stevenhagen, E. Fouvry (Univeriste Paris Saclay)
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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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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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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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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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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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Daniël Scheepers
Faculteit der Sociale Wetenschappen
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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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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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Oriënteren op de arbeidsmarkt via de Young Talent Group
Ben je ouderejaars rechtenstudent en wil jij je alvast oriënteren op de arbeidsmarkt? Dan kunt je terecht bij de Young Talent Group. Dit is een online platform met als doel rechtenstudenten te informeren over activiteiten op het gebied van arbeidsmarktoriëntatie. Met meer dan 45 aangesloten kantoren…
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10-jarig jubileum summer school Interest Group Politics
De ECPR summer school over Interest Group Politics viert zijn 10-jarig jubileum. Om deze speciale editie te vieren, omvat de zomerschool van dit jaar vele gerenommeerde onderzoekers en professoren uit de hele wereld. Als onderdeel van het jubileum wordt bovendien een buitengewone eendaagse conferentie…
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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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Nieuwe ISGA Research Group: Physical Violence and Public Order
Op 1 januari startte de research group Physical Violence and Public Order. Als voormalig onderdeel van de groep Terrorism and Political Violence, richt de nieuwe onderzoeksgroep zich op geweld variërend van school shootings zoals Columbine en Virginia Tech, tot aan huiselijk geweld, alcoholgerelateerd…
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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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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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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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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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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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The unit residue group
Promotie
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Diophantine equations in positive characteristic
In this thesis three different topics in number theory are studied.
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Jie HuWiskunde en Natuurwetenschappen
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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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Expansions of quantum group invariants
Promotie
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Managing group work (voertaal Engels)
Didactiek
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Random Walks on Arakelov Class Groups
Promotie
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Kummer theory for commutative algebraic groups
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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Arithmetic of affine del Pezzo surfaces
In this thesis integral points on affine del Pezzo surfaces are studied.
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Counting problems for number rings
Promotor: H.W. Lenstra
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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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Computability of the étale Euler-Poincaré characteristic
Promotor: S.J. Edixhoven, L.D.J. Taelman
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Enumerative arithmetic
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.