2017/10/21 by Shvartsman, Pavel
#46E35 #FOS: Mathematics #Functional Analysis (math.FA)
paper · doi:10.48550/arxiv.1710.07826
For each p>1 and each positive integer m we use divided differences to give intrinsic characterizations of the restriction of the Sobolev space Wmp(R) to an arbitrary closed subset of the real line.