IC/96/6 United Nations Educational Scientific and Cultural Organization and International Atomic Energy Agency INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS ON APPROXIMATE DIFFERENTIABILITY OF FUNCTIONS WITH BOUNDED DEFORMATION

IC/96/132 United Nations Educational Scientific and Cultural Organization and International Atomic Energy Agency INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS DERIVATION OF DICHROMATED GELATIN HOLOGRAMS FROM AGFA 8E75HD PLATES AND FABRICATION OF HOLOGRAPHIC FABRY-PEROT ETALON

The characteristics of diffraction efficiency and resolution of dichromated gelatin films derived from Agfa 8E75 HD plates by modified preparing and processing methods are presented. Using these films, fabricating of holographic Fabry-Perot etalon has been demonstrated and characteristic fringes of the Fabry-Perot effect have been observed.

International Centre for Theoretical Physics General Exact Solutions of Einstein Equations for Static Perfect Fluids with Spherical Symmetry International Atomic Energy Agency United Nations Educational, Scientific and Cultural Organization

United Nations Educational Scientific and Cultural Organization and International Atomic Energy Agency THE ABDUS SALAM INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS THE INFLUENCE OF TiO2 POLYMORPH, MECHANICAL MILLING AND SUBSEQUENT SINTERING ON THE FORMATION OF Ti-SUBSTITUTED SPINEL-RELATED Li0.5Fe2.5O4

United Nations Educational Scientific and Cultural Organization and International Atomic Energy Agency THE ABDUS SALAM INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS THE GENERALIZED MODEL OF POLYPEPTIDE CHAIN DESCRIBING THE HELIX-COIL TRANSITION IN BIOPOLYMERS

IC/96/47 United Nations Educational Scientific and Cultural Organization and International Atomic Energy Agency INTERNATIONAL CENTRE FOR THEORETICAL PHYSICS ON CURVES OVER FINITE FIELDS WITH MANY RATIONAL POINTS

We study arithmetical and geometrical properties of maximal curves, that is, curves defined over the finite field ¥q2 whose number of ¥q2 -rational points reachs the Hasse-Weil upper bound. Under a hypothesis on non-gaps at rational points we prove that maximal curves are ¥q2 -isomorphic to y q + y = x for some m £ Z + . MIRAMARE TRIESTE March 1996 1 E-mail: [email protected] E-mail: f...