Dergiler / International Electronic Journal of Geometry / 2016 / Cilt: 9 - Sayı: 1Eigenvalue Rigidity in Nonnegative Ricci CurvatureMehmet BEKTAS, Mihriban KÜLAHCIDergiInternational Electronic Journal of GeometrySayı2016 · Cilt: 9 - Sayı: 1Sayfa57–61DOI—