H. Fejzic

most citedTwo Pointwise Characterizations of the Peano Derivative

1 citations · 1 across the 4 of their papers we have counts for

collaborators

4 papers

math.CA2022

Gaussian Riemann Derivatives

J. M. Ash, S. Catoiu, H. Fejzic

J. Marcinkiewicz and A. Zygmund proved in 1936 that, for all functions $f$ and points $x$ , the existence of the $n$ th Peano derivative $f_{(n)} (x)$ is equivalent to the existence o…

math.CA2022

A Generalization of the GGR Conjecture

S. Catoiu, H. Fejzic

For each positive integer $n$ , function $f$ , and point $c$ , the GGR Theorem states that $f$ is $n$ times Peano differentiable at $c$ if and only if $f$ is $n - 1$ times Peano differe…

math.CA2022★ 1 cited

Two Pointwise Characterizations of the Peano Derivative

J. Marshall Ash, Stefan Catoiu, Hajrudin Fejzić

We provide the first two examples of sets of generalized Riemann derivatives of orders up to $n$ , $n \geq 2$ , whose simultaneous existence for all functions~ $f$ at~ $x$ is equivalent…

math.GM2017

A short proof of the error term in Simpson's rule

Hajrudin Fejzic

In this paper we present a short and elementary proof for the error in Simpson's rule.