3 papers
astro-ph.CO2026
Chebyshev interpolation in Einstein-Boltzmann codes
Herman Sletmoen
Einstein-Boltzmann codes compute theoretical predictions of cosmological models and rely heavily on interpolation in their independent variables: time , wavenumber and multi…
astro-ph.CO2026
SymBoltz.jl: A symbolic-numeric, approximation-free, and differentiable linear Einstein-Boltzmann solver
Herman Sletmoen
SymBoltz is a new Julia package for solving the linear Einstein-Boltzmann equations in cosmology. It features a symbolic-numeric interface for specifying equations, is free of appr…
astro-ph.CO2024
A simple prediction of the nonlinear matter power spectrum in Brans-Dicke gravity from linear theory
Herman Sletmoen, Hans A. Winther
Brans-Dicke (BD), one of the first proposed scalar-tensor theories of gravity, effectively makes the gravitational constant of general relativity (GR) time-dependent. Constraints o…