Sommaire

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