Jm. Borwein et al., NECESSARY CONDITIONS FOR CONSTRAINED OPTIMIZATION PROBLEMS WITH SEMICONTINUOUS AND CONTINUOUS DATA, Transactions of the American Mathematical Society, 350(6), 1998, pp. 2409-2429
We consider nonsmooth constrained optimization problems with semiconti
nuous and continuous data in Banach space and derive necessary conditi
ons without constraint qualification in terms of smooth subderivatives
and normal cones. These results, in different versions, are set in re
flexive and smooth Banach spaces.