TY - JOUR TI - Optimality conditions via weak subdifferentials in reflexive Banach spaces AB - In this paper the relation between the weak subdifferentials and the directional derivatives, as well as optimality conditions for nonconvex optimization problems in reflexive Banach spaces, are investigated. It partly generalizes several related results obtained for finite dimensional spaces. AU - HASSANI, Sara AU - JAMSHID, Mina AU - MAMMADOV, Musa PY - 2017 JO - Turkish Journal of Mathematics VL - 41 IS - 1 SN - 1300-0098 SP - 1 EP - 8 DB - TRDizin UR - http://search/yayin/detay/245798 ER -