Home › Authors › Yanhong Yang 👤 Yanhong Yang 3 books Books by Yanhong Yang Purity of the stratification b Purity of the stratification by Newton polygons and Frobenius-periodic vector bundles 2013 Xi Ya Bei Fei juan Xi Ya Bei Fei juan 2012 Wai guo yu yan wen xue ji guo Wai guo yu yan wen xue ji guo bie yan jiu 2004