HACETTEPE JOURNAL OF MATHEMATICS AND STATISTICS, cilt.37, sa.1, ss.9-24, 2008 (SCI-Expanded)
We investigate the description of the image of a continuous mappings acting in a Banach space, and the solvability of equations and inclusions. The results obtained can be applied to the Cauchy problem for a nonlinear differential equation (or inclusion). In particular, a solvability theorem of the mixed problem for a nonlinear hyperbolic equation is proved, and one Nirenberg problem is studied.