Sommaire du Fascicule no. 1

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

Sommaire du Fascicule no. 2

Contents
Space charge effects in the omegatron
p. 3-12
Unipotent quasigroups
p. 13-22
The infinite minimal rich monoid
p. 23-34
On autogenerating systems
p. 35-42
Limits in generalized algebraic categories - contravariant case
p. 43-53
Spectrophotometry of the comet 1975 IX
p. 55-60
Solar eclipse of 29 April 1976 and the difference between ET and UT
p. 61-64