[1] EOTVOS LORAND UNIV,COMP SCI,H-1364 BUDAPEST 5,HUNGARY
[2] PRINCETON UNIV,PRINCETON,NJ 08544
[3] AT&T BELL LABS,MURRAY HILL,NJ 07974
[4] NYU,COURANT INST MATH SCI,NEW YORK,NY 10012
[5] MIT,APPL MATH,CAMBRIDGE,MA 02139
[6] IBM CORP,THOMAS J WATSON RES CTR,DEPT MATH SCI,YORKTOWN HTS,NY 10598
[7] MATH SCI RES INST,BERKELEY,CA