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 Kรคhler-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 โ{128}{156}collapsantesโ{128}{157}