TY JOUR TI Linear perturbations of the Bloch type of space-periodic magnetohydrodynamic steady states. I. Mathematical preliminaries KW Kinematic dynamo problem KW hydrodynamic linear stability problem KW magnetohydrodynamic linear stability problem KW Bloch mode KW magnetic α-effect KW AKA-effect KW combined magnetohydrodynamic α-effect KW magnetic eddy diffusivity KW eddy viscosity KW scale separation. JO Russian Journal of Earth Sciences AU Chertovskih, R.A. AU Zheligovsky, V.A. PY 2023 IS 23 PB Geophysical Center of the Russian Academy of Sciences