In this paper, we study the position value for games in which partial cooperation exist, that is based on a union stable coalition system. The concept of basis is introduced for these systems, allowing for a definition of the position value. Moreover, an axiomatic characterization of the...

The paper proposes a new classification of schedules for resource-constrained project scheduling problems with minimum and maximum time lags between project activities and regular and different types of nonregular objective functions. The feasible region of the scheduling problems represents a...

Structural properties of generalised semi-Markov processes (GSMP) have been successfully studied in the literature. Examples are the celebrated commuting condition (CC), which is the key condition for unbiasedness of the infinitesimal perturbation analysis (IPA) gradient estimator, or the...

Various least core concepts including the classical least core of cooperative games are discussed. By a reduction from minimum cover problems, we prove that computing an element in these least cores is in general NP-hard for minimum cost spanning tree games. As a consequence, computing the...

In this paper, we discuss the stability of the sets of efficient points of vector-valued and set-valued optimization problems when the data (E <Subscript>n</Subscript>,f <Subscript>n</Subscript>) (resp. (E <Subscript>n</Subscript>, F <Subscript>n</Subscript>)) of the approximate problems converge to the data (E, f) (resp. (E, F)) of the original problem in the sense of...</subscript></subscript></subscript></subscript>