Remark1Itcanbeshownthat1isexactlylumpableto6byMifandonlyifthereexistsA2RllsuchthatAMMAsowegetthelumpingschemeconsistingofMandAMAMMM1WenotethatthereexistsmatrixMM12RllsincerankM ID: 516696
Remark1Itcanbeshownthat(1)isexactlylumpableto(6)byMifandonlyifthereexists^A2Rll;suchthat^AM=MA