Studia Scientiarium Mathematicarum Hungarica 30. (1995)

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STUDIA SCIENTIARUM MATHEMATICARUM HUNGARICA A QUARTERLY OF THE HUNGARIAN ACADEMY OF SCIENCES Studia Scienttarum Mathematicarum Hunganca publishes original papers on mathematics mainly in English, but also in German, French and Russian. It is published in yearly volumes of four issues (mostly double numbers published semiannually) by AKADÉMIAI KIADÓ Publishing House of the Hungarian Academy of Sciences H-1117 Budapest, Prielle Kornélia u. 19-35 Manuscripts and editorial correspondence should be addressed to J. Merza Managing Editor P.0. Box 127 H-1364 Budapest Tel.: (36)(1) 118-2875 Fax: (36)(1) 117-7166 e-mail: h3299mer @ or merza @ Subscription information For 1995 volumes 30-31 are scheduled for publication. The subscription price is $ 98.00 each, including normal postage, air delivery plus $ 20.00 per volume. Orders should be addressed to AKADÉMIAI KIADÓ P.O.Box 245 11—1519 Budapest © Akadémiai Kiadó, Budapest 1995