Proceedings of the American Mathematical Society, Vol. 36, No. 2 (Dec., 1972), pp. 485-490 (6 pages) This paper is concerned with differentiation of interval functions appearing in interval analysis.
Earlier D.Đ. Tošić obtained an infinite series representation for the central difference operator ${\delta _\theta }f\left( z \right) = f\left( {z' + \frac{1}{2}h ...