00780nam a22001697a 4500040003700000082001300037100002300050245006900073260003500142300003900177500014800216500004100364500003700405502005900442546001200501650009700513  cRiphah International University   a510bIRA  aIram Kubra (28174)  aA novel approach to descion cost based on θ-similarity relation  aIslamabadb(Unpublished)c2023  avii, 101 p.b: ill.c; 30 cm.e+CD  aSubmitted in partial fulfillment of the requirements for the degree of Master of Philosophy in Mathematics to the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. Abbas Ali  aThesis (M.Phil)--Riphah International University, 2023  aEnglish  aMathmatics vSimilarity relationsvTheoretic roughvLoss functionsvPreliminariesvDBSvFEAS