[en] The general structure of the differential cross section for/→/e^- + Li e^- + π⁺ + ⁶He process with the detection of two particles in the final state (for one-photon mechanism) is obtained. The scattering of nonpolarized and longitudinally polarized electrons by a target with vector and tensor polarization is considered. The polarization phenomena in the e^- + ⁶Li → e^- + π⁺ + ⁶He are defined by a set of 41 real structure functions. The P-odd polarization phenomena in the e^- + ⁶Li → e^- + π⁺ +⁶He reaction are also considered which are conditioned by P-odd nuclear forces. Polarization phenomena near threshold of this reaction are studied in detail when P-even amplitude is defined by two form factors, and P-odd amplitude is defined by one. The polarization phenomena in the ν + ⁶Li → ν + π⁺ + ⁶He reaction conditioned by weak neutral currents are also studied in general form