Stripped-envelope (Type Ib/c) supernovae form a special group among core-collapse SNe,
because their progenitors lost the H and He layers during the pre-supernova evolution. Because
of this mass-loss the debate on the surrounding envelope of these objects has not been settled
yet. Moreover, the analytic models also deepen this issue, because there is a discrepancy in the
gained ejecta masses from early- and late-time light curve fits. Due to this complex physical
nature, theoretical models are essential to understand better the physics of this kind of exploding
stars. Here I present a possible method for modelling the progenitor and the circumstellar
environment of these stripped-envelope SNe, which could help to solve the mass discrepancy
problem via hydrodynamic simulations.
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