The present note is concerned with the study of the relations between
the notions of asymptotic cones introduced by Dedieu and that of reces
sion cones introduced by Luc. Conditions under which these notions coi
ncide are given, as well as the fact that the compactness condition us
ed by Luc is related (more restrictively) to asymptotic compactness. A
s an application of these notions, a result on proper efficiency in th
e sense of Lampe, established by Luc in finite dimensions, is extended
to the infinite-dimensional case.