Az ELTE TTK Tudomanytortenet es Tudomanyfilozofia Tanszeke tisztelettel meghivja Ont es kollegait az 1996. November 11-en 17 orakor a Budapest, Rakoczi ut 5. I. 105-os szobaban tartando szeminariumara, amelyre a Becsi Kor Intezettel (Ausztria) valo egyuttmukodes kereteben kerul sor. A szeminariumon az alabbi ket eloadas hangzik majd el: THOMAS BREUER: A Goedelian Proposi tion for Internal Observers There have been suggestions that quantum mechanical incompleteness is just a consequence of the Goedelian incompleteness of formal systems. These claims are the main focus of the talk. Some undecidable propositions in quantum mechanics are given. Thomas Breuer was born 1966 in Poona, India. He studied physics at ETH Zuerich, mathematics at Princeton, and Philosophy at Cambridge. He obtained his Ph.D. from the University of Cambridge in 1995. Today he works at the Aust rian Academy of Sciences. MICHAEL STOELTZNER: Goedel and the Theory of Everything The Incompleteness Theorem is often conceived as a straightforward refutation of universal theories. Personally, however, Goedel believed in the capability of human mind to have stronger intuitions than those corresponding to any given formal system. To unravel and make fruitful Goedel's original position I will study the papers recently published as the third volume of the Complete Works. It turns out tha t in many respects Goedel reflects the then recent developments of mathematical physics which allows him to develop interesting insights into the 'level structure' we encounter among present physical theories. Goedel draws very close parallels between mathematics and physics with respect to the role of intuition and induction. Moreover, his own contribution to general relativity, the rotating universe, limits Hilbert's axiomatization program in the same manner as the incompleteness theorem did in ma thematics. In fact, it pinpoints at the intriguing question of the relation between the general level of laws of nature (or symmetries) and the respective solutions (or results of phase transitions) that mark the steps in the 'level structure' of our present physical theories. Michael Stoeltzner was born in Munich in 1964. He studied philosophy and physics at Tuebingen University, at the International School of Advanced Studies in Trieste (with a grant of the Studienstiftung des Deutschen Volkes), and the University of Vienna, where he graduated with Walter Thirring in 1994. His fields of interest are philosophy of physics, in particular the foundations of quantum mechanics, the history of the Vienna Circle, and Kantian epistemology.