H{ö}lder classes in $L^p$ norm on a chord arc curve in ${\mathbb{R}}^3$

Tatyana A. Alexeeva, Nikolay A. Shirokov

We define H{ö}lder classes in the $L^p$ norm on a chord-arc curve in ${\mathbb{R}}^3$ and prove direct and inverse approximation theorems for functions from these classes by function…