ISSN : 1226-0657
We begin with a brief survey of some of the known results dealing with Bloch constants. Bloch's theorem asserts that there is a constant B<TEX>$\_$</TEX>1.C/(1, 0) such that if f is holomorphic in the open unit disk D and normalized by │f'(0)│<TEX>$\geq$</TEX>1, then the Riemann surface of f contains an unramified disk of radius at least B<TEX>$\_$</TEX>1.C/(1, 0) (see[7,p.14]).(omitted)