The nonrelativistic dipole-length, -velocity and -acceleration absorption oscillator strengths for the 1s^22s-1s^22p transitions of the lithium isoelectronic se
The path-integral quantization of thermal scalar, vector, and spinor fields is performed newly in the coherent-state representation. In doing this, we choose th
We present an approach to solve Bethe-Salpeter (BS) equations exactly without any approximation if the kernel of the BS equations exactly is instantaneous, and