<正> Cylindrically symmetric inhomogeneoas cosmological model for bulk viscous fluid distribution with electro-magnetic field is obtained.The source of the magn
<正> By establishing the relation between the optical scaled fractional Fourier transform (FFT) and quantummechanical squeezing-rotating operator transform,we e
<正> Generalized Yang-Mills theory has a covariant derivative which contains both vector and pseudoscalargauge bosons.Based on this theory,we construct a U(4) s