KIBU2022-03-072022-03-072021-07-23http://erepository.kibu.ac.ke/handle/123456789/4482MAT 824:Operator Theory IenAttribution-NonCommercial-ShareAlike 3.0 United Stateshttp://creativecommons.org/licenses/by-nc-sa/3.0/us/MAT 824:Operator Theory IOperator Theory IMAT 824Other