  We study the influence of boundaries on chiral effects in hot dense
relativistic spinor matter in a strong magnetic field which is transverse to
bounding planes. The most general set of boundary conditions ensuring the
confinement of matter within the bounding planes is considered. We find that,
in thermal equilibrium, the nondissipative axial current along the magnetic
field is induced, depending on chemical potential and temperature, as well as
on a choice of boundary conditions. As temperature increases from zero to large
values, a stepwise behaviour of the axial current density as a function of
chemical potential is changed to a smooth one; the choice of a boundary
condition can facilitate either amplification or diminution of the chiral
separation effect. This points at a significant role of boundaries for physical
systems with hot dense magnetized relativistic spinor matter, e.g., compact
stars, heavy-ion collisions, novel materials known as Dirac and Weyl
semimetals.
