English

A Counterexample in Ito Integration Theory

Probability 2023-05-19 v1 Mathematical Finance

Abstract

Ito's Lemma implies that if WW is a Wiener process and ff is a twice continuously differentiable function, then the process f(W)f(W) is the sum of a time integral and an Ito integral. The Ito integrand is not necessarily locally square integrable. This note provides a counterexample.

Keywords

Cite

@article{arxiv.2305.10695,
  title  = {A Counterexample in Ito Integration Theory},
  author = {Lars Tyge Nielsen},
  journal= {arXiv preprint arXiv:2305.10695},
  year   = {2023}
}
R2 v1 2026-06-28T10:37:49.333Z