# Czechoslovak Mathematical Journal

## Vol. 58, No. 4, 2008 · Contents

Robert El Bashir, Tomas Kepka:
Commutative zeropotent semigroups with few invariant congruences

Michael A. Henning, Christina M. Mynhardt:
The diameter of paired-domination vertex critical graphs

G. Indulal, A. Vijayakumar:
Equienergetic self-complementary graphs

Peng-fei Yan, Cheng Lu:
Compact images of spaces with a weaker metric topology

Krzysztof A. Topolski:
On the vanishing viscosity method for first order differential-functional IBVP

Bolian Liu, Zhibo Chen, Muhuo Liu:
On graphs with the largest Laplacian index

Patricio Cumsille, Takeo Takahashi:
Wellposedness for the system modelling the motion of a rigid body of arbitrary form in an incompressible viscous fluid

Michelle L. Knox, Warren Wm. McGovern:
Rigid extensions of $\ell$-groups of continuous functions

Wieslaw A. Dudek, Valentin S. Trokhimenko:
Projection representable relations on Menger $(2,n)$-semigroups

Francisco Villarroya:
Bilinear multipliers on Lorentz spaces

Wladimir G. Boskoff, Bogdan D. Suceava:
Barbilian's metrization procedure in the plane yields either Riemannian or Lagrange generalized metrics

Shirong Li, Yangming Li:
On $S$-quasinormal and $c$-normal subgroups of a finite group

Amitabha Tripathi:
The postage stamp problem and arithmetic in base $r$

On the distance function of a connected graph

Ivan Chajda, Jan Kuhr:
Join-semilattices whose sections are residuated po-monoids

Guo-Fang Zhang:
Some properties of relatively strong pseudocompactness

Valentin Skvortsov, Francesco Tulone:
Kurzweil-Henstock type integral on zero-dimensional group and some of its applications

Kent Griffin, Jeffrey L. Stuart, Michael J. Tsatsomeros:
Noncirculant Toeplitz matrices all of whose powers are Toeplitz

Marek Balcerzak, Monika Potyrala:
Convergence theorems for the Birkhoff integral

Jianping Liu, Bolian Liu:
The maximum clique and the signless Laplacian eigenvalues