00954nam a22002057a 4500952012900000999001700129040003600146082001300182100003100195245005300226260003500279300003800314500014800352500004100500500004100541502005900582546001200641650008800653942000700741  00104071aRIUbRIUd2023-01-09eRiphah International Universityl0o510 BILp69679r2023-01-09 00:00:00t1w2023-01-09yTH  c48048d48048  cRiphah International University  a510bBIL  aBilal Naseer Ahmed (23701)  aRoughness in semilattices via V -regular classes  aIslamabadb(Unpublished)c2022  avii, 63 p.b: ill.c; 30 cm.e+CD  aSubmitted in partial fulfillment of the requirements for the degree of Master of Philosophy in Mathematics to the Department of Basic Sciences.  aIncludes bibliographical references.  aThesis supervisor: Dr. Naveed Yaqoob  aThesis (M.Phil)--Riphah International University, 2022  aEnglish  aMathematicsvRough subsemilatticesvJoin semi latticevMeet semi latticevDBSvFEAS  cTH