## Rendiconti dell'Istituto di matematica dell'Università di Trieste: an International Journal of Mathematics vol.30 (1999) : [13] Collection home page

CONTENTS

J. Carlos S. Kiihll and Claudina Izepe Rodrigues
Semi-free circle actions: the multiplicative structure

M.T. Mustafa
Totally geodesic horizontally conformal maps

Complex foliations in generalized twistor spaces

A. P. Caetano and R. F. Picken
On a family of topological invariants similar to homotopy groups

Antonella Nannicini
Twistor bundles of almost symplectic manifolds

S. Kumaresan and Jyotshana Prajapat
Analogue of Gidas-Ni-Nirenberg result in hyperbolic space and sphere

G. Arioli and F. Gazzola
On a quasilinear elliptic differential equation in unbounded domains

Alessandro Soranzo
Determination of convex bodies from ±$\infty$-chord functions

Rabah Labbas, Mohand Moussaoui and Mohamed Najmi
Singular behavior of the Dirichlet problem in Hölder spaces of the solutions to the Dirichlet problem in a cone

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