EntityQ2917249· pop 5· linked from 57 articlesstateSign in to savein functional analysis, a positive linear functional of norm 1Connectionsinner product spaceEntityKrein–Milman theoremEntityGelfand–Naimark–Segal constructionEntityRiesz spaceEntityquantum mechanicsEntityHilbert spaceEntityfunctional analysisEntityRiemann hypothesisEntitycalculus of variationsEntityCauchy–Schwarz inequalityEntityquantum stateEntitygeneralizationEntityBanach spaceEntitynormed vector spaceEntitydual spaceEntityparallelogram lawEntitydensity matrixEntitydistributionEntitytopological vector spaceEntityseparable spaceEntityCategoriesC*-algebrasFunctional analysis