Abstract:
It is proved that for any n⩾2 there exists continuous function f:Rn→R which is differentiable almost everywhere, but has no strong gradient almost everywhere.
Citation:
G. G. Oniani, “On the relationship between differentiability conditions and existence of a strong gradient”, Mat. Zametki, 77:1 (2005), 93–98; Math. Notes, 77:1 (2005), 84–89