chapter  8
Blumberg’s theorem and Sierpinski–Zygmund functions
ByGilbert W. Bassett Jr., Roger Koenker
Pages 16

In various questions of mathematical analysis, one often needs to consider some nontrivial restrictions of a given function (e.g., acting from R into R), which have nice additional descriptive properties. In general, these properties do not hold for the original function but may be valid for its restrictions to certain non-small subsets of its domain.