We prove that for any p perfect set of positive measure and for it's any density point x0 one can construct a measurable function f(x), bounded on [0,1), such that each measurable and bounded function, which coinc...We prove that for any p perfect set of positive measure and for it's any density point x0 one can construct a measurable function f(x), bounded on [0,1), such that each measurable and bounded function, which coincides with f(x) on the set p has diverging Fourier-Walsh series on the point xo.展开更多
文摘We prove that for any p perfect set of positive measure and for it's any density point x0 one can construct a measurable function f(x), bounded on [0,1), such that each measurable and bounded function, which coincides with f(x) on the set p has diverging Fourier-Walsh series on the point xo.