Comment on ‘‘Alfvén ‘resonance’ reconsidered: Exact equations for wave propagation across a cold inhomogeneous plasma’’ [Phys. Plasmas 1, 3523 (1994)]

In a recent paper Bellan [P. M. Bellan, Phys. Plasmas 1, 3523 (1994)] criticizes magnetohydrodynamics for not being an accurate model of plasma behavior at low frequencies and leading to the incorrect prediction of singularities associated with the Alfvén wave resonances. Grave errors of the paper having to do with misunderstanding of what is a physical model and with misrepresentation of the original contributions to the field are exposed.