We present a modal logic for the class of subset spaces based on discretely descending chains of sets. Apart from the usual modalities for knowledge and effort the standard temporal connectives are included in the underlying language. Our main objective is to prove completeness of a corresponding axiomatization. Furthermore, we show that the system satisfies a certain finite model property and is decidable thus.

Biographische Informationen Tobias Cantz leitet die Arbeitsgruppe "Translationale Hepatologie und Stammzellbiologie" im Exzellenzcluster REBIRTH. Prof. Dr. Hans-Georg Dederer lehrt Staats- und Verwaltungsrecht, Europarecht und internationales Wirtschaftsrecht an der Universität Passau. Prof. Dr. Thomas Heinemann lehrt "Ethik, Theorie und Geschichte der Medizin" an der Philosophisch-Theologischen Hochschule Vallendar.

From its launch in 1962, the African Writers Series enabled the dissemination of African literature worldwide and contributed to the creation of a critical sensitivity among readers and critics alike to its distinct qualities and values. It is difficult to imagine the existence of a solid ‘tradition’ of African literature in English without the African Writers Series. What is more, Heinemann Educational Books made it possible for African authors writing in Arabic or French to be part of a larger (...) literary phenomenon. The works varied from creative to biographical writings and echoed the rich multilingual and multicultural African voices then in the making. This article seeks to shed light on various aspects of publishing the AWS. It offers a survey of the rise and development of the series and the crisis that eventually befell it. (shrink)

Towards a Cultural History of the Mamluk Era. Edited by Mahmoud Haddad, Arnim Heinemann, John L. Meloy, and Souad Slim. Beiruter Texte und Studien, vol. 118. Beirut: Orient-Institut, 2010. [Distributed by Ergon Verlag Würzburg.] Pp. xii + 164 + 152, illus. €68.