TYPE I SUPERSTRING THEORY IN THE FORM OF OPEN TYPE IIB ONE WITH APPROPRIATE CHOICE OF BOUNDARY CONDITIONS

摘要

We improve relation between type IIB and type I superstring theory. In fact we obtain type I theory as type IIB on the solution of appropriately chosen boundary conditions. We find that type I theory, which is symmetric under world-sheet parity transformation Ω:σ→-σ, beside Ω even fields of the type IIB theory, contains squares of Ω odd fields.