3 papers
math.CO2025
A combinatorial approach to phase transitions in random graph isomorphism problems
Dimitris Diamantidis, Takis Konstantopoulos, Linglong Yuan
We consider two independent ErdÅs-Rényi random graphs, with possibly different parameters, and study two isomorphism problems, a graph embedding problem and a common subgraph pro…
q-fin.MF2025
Short-Rate Derivatives in a Higher-for-Longer Environment
Aram Karakhanyan, Takis Konstantopoulos, Matthew Lorig +1
We introduce a class of short-rate models that exhibit a ``higher for longer'' phenomenon. Specifically, the short-rate is modeled as a general time-homogeneous one-factor Markov d…
math.PR2025
The log-Sobolev inequality for spin systems of higher order interactions
Takis Konstantopoulos, Ioannis Papageorgiou
We study the infinite-dimensional log-Sobolev inequality for spin systems on with interactions of power higher than quadratic. We assume that the one site measure wi…