K. Kurdyka et A. Parusinski, W(F)-STRATIFICATION OF SUBANALYTIC FUNCTI ONS AND THE LOJASIEWICZ INEQUALITY, Comptes rendus de l'Academie des sciences. Serie 1, Mathematique, 318(2), 1994, pp. 129-133
For every subanalytic function f the existence of a stratification sat
isfying the strict Thom condition w(f) is proven. Also the second Loja
siewicz inequality is generalized to such functions. As a corollary we
obtain a local inequality relating the gradient, the distance to zero
s and the value of continuous subanalytic function.