TIME SYMMETRIC BOUNCING MODEL AND HORIZON PROBLEM IN THE EARLY UNIVERSE

In 1982, on the basis of calculating one-loop quantum effect of the matter field, Liu Liao et al. (Liu Liao & Li Jianzhen, Acta Physica Sinica, 31(1982), 1676) proposed a 'Time Symmetric Bouncing Cosmological Model' without singularity, which is acceptable physically and philosophically. Here, we will prove that there is no horizon problem in their model.