Sommaire

Contents
Remarks on tensor proucts and their applications in quantum theory - II. Spectral properties
p. 3-35
On relations between right and left eigenvectors of nonselfadjoint matrix pencils
p. 37-45
On the non-existence of certain ovaloids
p. 47-49
Enlargement of the Earth's shadow during the lunar eclipses observed in the years 1973-1975
p. 51-63
Observations of comets and asteroids at the Kleť Observatory in the year 1975
p. 65-74