Volume 15, number 1, 2001

•   András Ádám: On some algebraic properties of automata 1

•   Jürgen Dassow, Gheorghe Paun: P Systems with Communication Based on Concentration 9

•   Pál Dömösi, Satoshi Okawa: A Chomsky-Schützenberger-Stanley Type Characterization of the Class of Slender Context-Free Languages 25

•   Ferenc Gécseg, Balázs Imreh: On isomorphic representations of generalized definite automata 33

•   A.V. Kelarev, O.V. Sokratova: Languages Recognized by a Class of Finite Automata 45

•   Shankara Narayanan Krishna, Raghavan Rama, Kamala Krithivasan: P Systems with Picture Objects 53

•   Monti Angelo, Peron Andriano: Logical definability of Y-tree and trellis systolic É-languages 75

•   Attila Tanács, Gábor Czédli, Kálmán Palágyi, Attila Kuba: Affine matching of two sets of points in arbitrary dimensions 101

•   Gerhard J. Woeginger, Jirí Sgall: The complexity of coloring graphs without long induced paths 107