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ReACT extends the Copter (ascl:1304.022) and MG-Copter packages, which calculate redshift and real space large scale structure observables for a wide class of gravity and dark energy models. Additions to Copter include spherical collapse in modified gravity, halo model power spectrum for general theories, and real and redshift space LSS 2 point statistics for modified gravity and dark energy. ReACT also includes numerical perturbation theory kernel solvers, real space bispectra in modified gravity, and a numerical perturbation theory kernel solver up to 4th order for 1-loop bispectrum.
mochi_class extends the hi_class code (ascl:1808.010), itself a patch to the Einstein-Boltzmann solver CLASS (ascl:1106.020). It replaces α-functions by stable basis to ensure stability and takes general functions of time as input, including the dark energy equation of state or its normalized background energy-density. mochi_class provides stability test checking for mathematical (classical) instabilities in the scalar field fluctuations, and also includes a GR approximation scheme, among other new capabilities.