Sommaire

Contents
Graphs and quasitrivial groupoids
p. 3-15
On strong continuity of derivatives of mappings
p. 17-27
On the radical theory of involution algebras
p. 29-40
A direct transformation between two fundamental matrix canonical forms
p. 41-47
Evolution of process coefficient of the sulphur dioxide in urban zone
p. 49-61
Some remarks on infrared spectroscopy of astronomically interesting silicates
p. 63-68