id	keyword
ejpam-4931	∫ t
ejpam-4931	∫ ω
ejpam-4931	l2(ω
ejpam-4931	− ∫
ejpam-4931	∈ l2
ejpam-4931	dxdy
ejpam-4931	math
ejpam-4931	ξk1,r1
ejpam-4931	appl