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CLASSpp Manual
Cosmology reference and developer manual
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#include <background_ic_context.h>
Context passed to BaseSpecies::SetBackgroundInitialConditions(). a_ini : initial scale factor; the value the module stores at index_bi_a_, exposed so species need not know the {B} layout. rho_rad : total radiation density at the initial time (units of H0^2), needed by ScalarField attractor ICs. pvecback_integration : the integration vector to fill.