SEVER S. DRAGOMIR
Bessel type inequalities for non-orthonormal families
of vectors in inner product spaces
Pages 93-102
Received: 8 September 2005
Revised: 29 November 2005
Mathematics Subject Classification (2000): 46C05 - 26D15
Abstract Some sharp Bessel type inequalities for non-orthonormal families of vectors in inner product spaces are given. Applications for complex numbers are also provided.