AN APPROACH TO THE SUPERGRAVITY THEORIES

In this paper we have established the ISO (3, 1|N),OSp(N|4) and S∪(2,2|N) supergravities, attempted a possible quantization and renormalization scheme of the ISO(3,1|N) supergravity. The embeddingof S∪(5) grand unified theory in the S∪(2,2|N) superunified theory is given and the method of particle multiplets in the supergravities is discussed.