Geometry Symposium Utrecht 1980

A conservation law for harmonic maps.- Double tangency theorems for pairs of submanifolds.- Remarks on the Riemannian metric of a minimal submanifold.- On Lie algebras of vectorfields, Lie algebras of differential operators and (nonlinear) filtering.- A Torelli theorem for Kähler-Einstein K3 surfaces.- The probability of linking of random closed curves.- Growth of positive harmonic functions and Kleinian group limit sets of zero planar measure and hausdorf dimension two In celebration of Nico Kuiper's sixtieth birthday.- Sur le probleme des normales a une zphere convexe, et l'approximation des Applications "collapsantes".