Beiträge zur Theorie der stetigen Functionen einer reellen Veränderlichen.
Bemerkung zu einem Problem von V. Jarník
Bemerkungen über approximative Ableitung
Bernstein’s analyticity theorem for quantum differences
We consider real valued functions defined on a subinterval of the positive real axis and prove that if all of ’s quantum differences are nonnegative then has a power series representation on . Further, if the quantum differences have fixed sign on then is analytic on .
Book Reviews