VISCOUS COSMOLOGICAL MODELS IN (1-DIMENSIONS(1))

Cosmological solutions in (1 + 1) dimensions in the theory of gravity given by Mann have been obtained in the presence of dissipative phenom ena. We have studied both the truncated Israel-Stewart theory and the full causal theory in these lower dimensions. In the full causal theor y, we discuss two cases, one with the temperature obeying a power law behavior and the other without this assumption. Some of the solutions found in the truncated Israel-Stewart theory and in the full causal th eory are comparable to those obtained by Chimento and Cossarini in (1 + 1) dimensions in Eckart theory.