Department of Electronics, Technical University of Koszalin, Śniadeckich 2, 75-453 Koszalin, Poland
Copyright © 2011 Mirosław Ślosarski. This is an open access article distributed under the
Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
We generalize and modify Lefschetz sets defined in 1976 by L. Górniewicz, which leads to more general results in fixed point theory.