In this note, we point out that Note 6.8 of Das 2, sFr (sFr (A)) = sFr (A), is false in general but it is true if A is a semi-open set or a semi-closed set.
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Details
Title
A NOTE ON SEMI-FRONTIER
Creators - without role
B Ahmad
M Khan
T Noiri
Publication Details
Indian journal of pure and applied mathematics, Vol.22(1), pp.61-62
Publisher
Indian Nat Sci Acad
Number of pages
2
Identifiers
9935938908331
Academic Unit
King Abdulaziz University; Islamic University of Al Madinah