00765nam a22001697a 4500040003600000082001300036100003100049245005300080260003500133300003800168500014800206500004100354500004100395502005900436546001200495650008800507  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University  a510bBIL  aBilal Naseer Ahmed (23701)  aRoughness in semilattices via V -regular classes  aIslamabadb(Unpublished)c2022  avii, 63 p.b: ill.c; 30 cm.e+CD  aSubmitted in partial fulfillment of the requirements for the degree of Master of Philosophy in Mathematics to the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