3 papers
math-ph2026
Quasi-local probability averaging in the context of cutoff regularization
A. V. Ivanov, I. V. Korenev
In this paper, we study the properties of averaged fundamental solutions of a special type for Laplace operators in the Euclidean space of an arbitrary dimension. We consider a cla…
hep-th2026
Three-loop functions for a quartic model with a cutoff
A. V. Ivanov, V. A. Nikiforov
This paper presents numerical values for auxiliary integrals and coefficients of the beta function in the three-loop approximation for a four-dimensional model with a quartic inter…
hep-th2025
Three-loop singularity structure for a non-linear sigma model
P. V. Akacevich, A. V. Ivanov, I. V. Korenev
The paper is devoted to the three-loop renormalization of the effective action for a two-dimensional non-linear sigma model using the background field method and a cutoff regulariz…