... CorporationEURASIP Journal on Advances in Signal ProcessingVolume 2009, Article ID 379402, 12 pagesdoi:10.1155/2009/379402 Research Article Bounds for Eigenvalues of Arrowhead Matrices and TheirApplications ... and[dj+1/dm,1],respectively .For ∈ [0,dj−1/dm], we havedj+t= dj−1+ f2(ρ)anddj+1= dj .For ∈ [dj−1/dm, dj/dm], wehavedj+ t = f4(ρ)anddj+1= dj .For ∈ [dj/dm, ... d2/dm], and [d2/dm,1]. For ρ∈ [0,d1/dm], we haved1= ρdm,d2+ s = d1+ f1(ρ). For ρ∈ [d1/dm, d2/dm], we haved1= d1,d2+ s = f3(ρ). For ρ∈ [d2/dm,1],...