Mai, Zhou, Relative Index and the Pairing between the Relative K-Homology and K-Comology, Acta Mathematica Sinica, New Series Chinese Journal of Mathematics, 12(2), 1996, pp. 156-161
In this paper we discuss the relative index for the Atiyah-Patodi-Singer type elliptic boundary value problems, as an application we give a new approach to the pairing between the relative K-homoogy and K-komology.