= radius of cylindrical shell = parameter = (1 + A) = elasticity modulus = thickness = (-l)i>» = index = circumferential harmonic, a positive integer = complex-valued root = complexvalued root for zero prestress = (p/a)(e*)i" = const = lateral displacement ratio =-t0*/a = lateral displacement = axial coordinate = ax(e*) = circumferential coordinate = a * = complex variable = complex number = complex number = A/4p0 = see Eq. (21) = small number = ax(e*) and <£*(e*), the assumed solution can be rewritten as .