2 papers
astro-ph.CO2026
Dynamical dark energy from Kretschmann scalar at low redshifts
A. B. Fernandes, S. H. Pereira, J. F. Jesus +1
In this work, we present a cosmological model in which the cosmological constant term is replaced by the Kretschmann scalar at the level of the action. In this way, it becomes poss…
math.CV2025
Proof of the metric Arnold's corank problem
Aexandre Fernandes, Zbigniew Jelonek, José Edson Sampaio
In this article, we approach the Arnold corank problem, posed by Arnold in 1975, which asks whether the corank of holomorphic functions is an ambient topological invariant. Here, w…