  Non-equilibrium Green's function technique has been used to calculate
spin-dependent electronic transport through a quantum dot in the Kondo regime.
The dot is described by the Anderson Hamiltonian and is coupled either
symmetrically or asymmetrically to ferromagnetic leads, whose magnetic moments
are noncollinear. It is shown that the splitting of the zero bias Kondo anomaly
in differential conductance decreases monotonically with increasing angle
between magnetizations, and for antiparallel configuration it vanishes in the
symmetrical case while remains finite in the asymmetrical one.
