Archiv: Stochastik Rhein-Main

22.05.2019 Stochastik-Kolloquium Frankfurt

Untersuchung der Überlappungswahrscheinlichkeit in Derrida’s Random Energy Models

08.05.2019 Stochastik-Kolloquium Frankfurt

An introduction to log-correlated fields and multiplicative chaos

15.03.2019 Stochastik-Kolloquium Frankfurt

Wege im vollständigen Graphen mit zufälligen Gewichten

15.03.2019 Stochastik-Kolloquium Frankfurt

Stochastische Analyse von Cuckoo-Hashing

20.02.2019 Stochastik-Kolloquium Frankfurt

Detecting Joint Pauses in Parallel Point Processes

20.02.2019 Stochastik-Kolloquium Frankfurt

Metrische Multidimensionale Skalierung

31.10.2018 Stochastik-Kolloquium Frankfurt

Rekonstruktion zufällig verkürzter Zeichenketten

22.01.2020 Stochastik-Kolloquium Frankfurt

Crossing a fitness valley as a metastable transition in a stochastic population model

06.06.2024 Stochastik-Kolloquium Frankfurt

B cell phylodynamics and mean-field multi-type birth and death processes

No knowledge of biology will be necessary to understand this talk. Germinal centers (GC) are micro-anatomical structures that transiently form in lymph nodes during an adaptive immune response. In a GC, B cells—the cells that make antibodies—diversify and compete based on the ability of the antibodies they express to recognize a foreign antigen molecule. As GC B cells proliferate, they undergo targeted mutations in the genomic locus encoding the antibody protein that can modify its antigen binding affinity. Via signaling from other GC cell types, the GC can monitor the binding phenotype of the B cell population it contains and provide survival signals to B cells with the highest-affinity antibodies (i.e., birth and death rates depend on type). Motivated by this mechanism, we develop a mean-field model that couples the birth and death rates in a focal multi-type birth and death process (MTBDP) with D types to the empirical distribution of states—i.e., the mean-field over an exchangeable system of N replica MTBDPs. The empirical distribution process of the N replicas converges to a deterministic probability measure-valued flow as N goes to infinity. In the limit, the focal process evolves as a multi-type birth and death process with rates governed by the probability measure-valued flow which is in turn the flow of one-dimensional marginal distributions of the focal process. Individual focal processes become independent in the limit and this holds out the hope of inference being feasible for this model. This is joint work with William S. DeWitt, Ella Hiesmayr, and Sebastian Hummel. weiterlesen

03.07.2019 Stochastik-Kolloquium Frankfurt

David Damanik (Rice University, Houston)

Extra-Kolloquium: Analysis & Stochastik

15.06.2018 Stochastik-Kolloquium Frankfurt

Dr. Arash Jamshidpey (IMPA Rio de Janeiro / Carleton University Ottawa)

Interacting populations in fluctuating environments

28.05.2021 Stochastik-Kolloquium Frankfurt

Dr. Jon Warren (Department of Statistics, University of Warwick)

A family of local times studied as a Markov process

24.04.2018 Stochastik-Kolloquium Frankfurt

Dr. Kevin Leckey (TU Dortmund)

A limit theorem for the ρ-length of random functional graphs with fixed degree sequences

07.06.2017 Stochastik-Kolloquium Frankfurt

Dr. Viet Chi TRAN (Université des Sciences et Technologies de Lille)

Hawkes processes with self-excitation and inhibition

30.01.2017 Stochastik-Kolloquium Frankfurt

Jean-Francois Le Gall (Université Paris-Sud and Institut universitaire de France)

Random planar geometry

24.04.2019 Stochastik-Kolloquium Frankfurt

Karl-Theodor Sturm (Universität Bonn)

Optimal transport, heat flow, and Ricci curvature on metric measure spaces

18.11.2019 Stochastik-Kolloquium Frankfurt

Prof. Dr. Dirk Metzler (FB Biologie/ LMU München)

Hybridzone zwischen Rabenkrähen und Nebelkrähen: Artbildung allein durch Paarungspräferenzen?

10.05.2017 Stochastik-Kolloquium Frankfurt

Prof. Dr. Hsien-Kuei Hwang (Academia Sinica, Taipeh)

Coin-tossing in Algorithmics

30.10.2019 Stochastik-Kolloquium Frankfurt

Prof. Dr. Hsien-Kuei Hwang (Academia Sinica, Taipeh)

Stirling numbers of the second kind: the history of early developments and an elementary approach to asymptotic normality

08.11.2017 Stochastik-Kolloquium Frankfurt

Prof. Dr. Sebastian Doehler (Hochschule Darmstadt)

New false discovery rate controlling procedures for discrete data

Archiv Oberseminar Frankfurt

Events

Untersuchung der Überlappungswahrscheinlichkeit in Derrida’s Random Energy Models

An introduction to log-correlated fields and multiplicative chaos

Wege im vollständigen Graphen mit zufälligen Gewichten

Stochastische Analyse von Cuckoo-Hashing

Detecting Joint Pauses in Parallel Point Processes

Metrische Multidimensionale Skalierung

Rekonstruktion zufällig verkürzter Zeichenketten

Crossing a fitness valley as a metastable transition in a stochastic population model

B cell phylodynamics and mean-field multi-type birth and death processes

Extra-Kolloquium: Analysis & Stochastik

Interacting populations in fluctuating environments

A family of local times studied as a Markov process

A limit theorem for the ρ-length of random functional graphs with fixed degree sequences

Hawkes processes with self-excitation and inhibition

Random planar geometry

Optimal transport, heat flow, and Ricci curvature on metric measure spaces

Hybridzone zwischen Rabenkrähen und Nebelkrähen: Artbildung allein durch Paarungspräferenzen?

Coin-tossing in Algorithmics

Stirling numbers of the second kind: the history of early developments and an elementary approach to asymptotic normality

New false discovery rate controlling procedures for discrete data

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