Public repository of the Cosmic Linear Anisotropy Solving System (master for the most recent version of the standard code; GW_CLASS to include Cosmic Gravitational Wave Background anisotropies; classnet branch for acceleration with neutral networks; ExoCLASS branch for exotic energy injection; class_matter branch for FFTlog)
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Why the density perturbations of matter and CDM grow but in the negative direction? #516
We know they should grow in positive direction, but when I run explanatory.ini and plot the delta_b, delta_r and delta_cdm, they decrease with tau/scale factor/time. Can you please tell me why is it happening? It should grow as logarithmic and t^(2/3) at right places but its not. Also can you please tell me exactly which file should I see for the differential equations and their code for solution? Thanks
We know they should grow in positive direction, but when I run explanatory.ini and plot the delta_b, delta_r and delta_cdm, they decrease with tau/scale factor/time. Can you please tell me why is it happening? It should grow as logarithmic and t^(2/3) at right places but its not. Also can you please tell me exactly which file should I see for the differential equations and their code for solution? Thanks