Vol. 122, No. 2, 1997 · Contents

Bohdan Zelinka:
Circular distance in directed graphs

Marian Trenkler, Vladimir Vetchy:
Magic powers of graphs

Ivan Chajda:
Rees ideal algebras

Vlastimil Ptak:
Factorization of Toeplitz and Hankel operators

Jan Jakubik:
Unions of uniquely complemented lattices

Ondrej Dosly, Roman Hilscher:
Spectral properties of fourth order differential operators

Jiri Karasek:
Double $n$-ary relational structures

Robert Vrabel:
Upper and lower solutions for singularly perturbed semilinear Neumann's problem

Miroslava Ruzickova:
Comparison theorems for differential equations of neutral type

Marek Jukl:
Inertial law of symplectic forms on modules over plural algebra

J. Fuka, Z. J. Jakubowski:
On some properties of the class $\Cal P(B,b,\alpha)$

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