Nonrigidity of piecewise-smooth circle maps

Habibulla Akhadkulov, Akhtam Dzhalilov, Mohd Salmi Md. Noorani

Let $f_i,$ $i=1,2$ be piecewise-smooth $C^1$ circle homeomorphisms with two break points, $\log D{f}_i,$ $i=1,2$ are absolutely continuous on each continuity intervals of $Df_{…