Institute of Mathematics and Informatics Bulgarian Academy of Sciences
Serdica Mathematical Journal, Vol. 23, No 1, (1997), 35p-58p
We develop an abstract subdifferential calculus for lower
semicontinuous functions and investigate functions similar to convex functions.
As application we give sufficient conditions for the integrability of a lower
∗ The work is partially supported by NSFR Grant No MM 409/94.