activity
20072026
most citedRobust analysis of preferential attachment models with fitness

27 citations · 82 across the 25 of their papers we have counts for

collaborators

31 papers

q-bio.PE2026

Emergence of polymorphism in stochastic evolutionary games

Bill Nunn, Marcel Ortgiese, Tim Rogers

Deterministic evolutionary game theory makes no distinction between a monomorphic population of individuals all of whom share a mixed evolutionarily stable strategy and a polymorph…

physics.soc-ph2026

Balancing innovation and assimilation in research communities

Bill Nunn, Maria Horner, Marcel Ortgiese +1

It has been statistically observed that the speed at which a corpus of knowledge advances does not scale linearly with quantities like the number of active researchers or number of…

math.PR2026

Existence, uniqueness and moment bounds for a spatial model of Muller's ratchet

João Luiz de Oliveira Madeira, Marcel Ortgiese, Sarah Penington

In this article, we consider a generalisation of the spatial Muller's ratchet introduced by Foutel-Rodier and Etheridge. This particle system is a spatial model of an asexual popul…

math.PR2026

A compact support property for infinite-dimensional SDEs with Hölder continuous coefficients

Thomas Hughes, Marcel Ortgiese

We consider non-negative solutions to some infinite-dimensional SDEs on with Hölder continuous noise coefficients. We prove that if the Hölder exponent is less than…

math.PR2026

A functional law of large numbers for a spatial model of Muller's ratchet

João Luiz de Oliveira Madeira, Marcel Ortgiese, Sarah Penington

The spatial Muller's ratchet is a model introduced by Foutel-Rodier and Etheridge to study the impact of cooperation and competition on the fitness of an expanding asexual populati…

math.PR2024

The contact process on dynamical random trees with degree dependence

Natalia Cardona-Tobón, Marcel Ortgiese, Marco Seiler +1

The contact process is a simple model for the spread of an infection in a structured population. We investigate the case when the underlying structure evolves dynamically as a degr…