THE EXAMPLE OF THE BUECTIVE MAPPING <i>f</i> :R → <i>R </i>SUCH THAT / IS EVERYWHERE DISCONTINUOUS, BUT AN INVERSE OF THE / IS CONTINUOUS AT A COUNTABLE SET OF POINTS
In this paper we consider the example of the bijective mapping f: R → R such that / is everywhere discontinuous, but an inverse of the / is continuous at a countable set of points