λ-Difference set

Last-modified: 2011-12-27 (火) 19:04:25

Definition

  • A subset S ⊂ X is called a λ-Difference set (in short λ-D-set), if there
    are two λ-open sets U , V in X such that imgtex.fcgi?%5bres=100%5d%7b%5c%5b%20U%5cneq%20X%5cmbox%7b%20and%20%7dS=%20U%5csetminus%20V%20%5c%5d%7d%25.png .

Reference

  • Caldas Miguel, Jafari Saeid, Navalagi Govindappa, More on λ-closed sets in topological spaces.,Rev. Colombiana Mat. 41 (2007), no. 2, 355-369.