A. Lebre

collaborators

2 papers

math.FA2017

Semi-Fredholmness of weighted singular integral operators with shifts and slowly oscillating data

Alexei Yu. Karlovich, Yuri I. Karlovich, Amarino B. Lebre

Let $α, β$ be orientation-preserving homeomorphisms of $[0, \infty]$ onto itself, which have only two fixed points at $0$ and $\infty$ , and whose restrictions to $\mathbb{R}_+=(0,\in…

math.FA2010

Necessary Conditions for Fredholmness of Singular Integral Operators with Shifts and Slowly Oscillating Data

Alexei Yu. Karlovich, Yuri I. Karlovich, Amarino B. Lebre

Suppose $α$ is an orientation-preserving diffeomorphism (shift) of $\mR_+=(0,\infty)$ onto itself with the only fixed points $0$ and $\infty$ . In \cite{KKLsufficiency} we found suf…