The existence of critical values in an abstract perturbation problem.
The existence of polar non-degenerate functions on a topological manifold
The Geometry of Critical and Near-Critical Values of Differentiable Mappings.
The Łojasiewicz gradient inequality in a neighbourhood of the fibre
Some estimates of the Łojasiewicz gradient exponent at infinity near any fibre of a polynomial in two variables are given. An important point in the proofs is a new Charzyński-Kozłowski-Smale estimate of critical values of a polynomial in one variable.
The non-criticality of certain families of affine varieties.
The number of critical points in Morse approximations
Topological Type in Families of Germs.
Topologically nondegenerate functions
Total curvature of manifolds in self-immersed manifolds.
Totale Absolutkrümmung von Hyperflächen