THIS IS AN OLD FTP DIRECTORY. PLEASE USE THE FOLLOWING ADDRESS ftp.ens.fr CONNECT BY ANONYMOUS FTP AND GO INTO THE FOLLOWING DIRECTORY /pub/dmi/ens/users/castagna/ THERE YOU WILL FIND THE FOLLOWING FILES FILE SHORT DESCRIPTION binary.ps.Z it contains a survey "On binary methods" infocompu.dvi lambda&: a kernel calculus for object oriented programming final version lfp92.dvi extended abstract (obsolete: read infocompu !) covariance.dvi why covariance vs. contravariance is a false problem (TOPLAS) final version tlca93.dvi semantics: full paper of CGL93 - final version tcs95.dvi How to use of lambda& to type object-oriented languages final version fsttcs93.dvi extended abstract of tcs95.dvi dbpl93.dvi second order (extended abstract) - final version secondord.dvi it contains dbpl93.dvi and much more - (FACS) final version popl94.dvi.Z variant of F-sub with decidable subtyping - final version popl94errata.dvi.Z errata of the paper above (published in POPL95) o2.dvi.Z how a compiler can guarantee type safety even if the language uses a covariant subtyping rule (Tech Rep) AND SOME MORE