Two complete formulas in a two dimensional Riemannian manifold. (English. Chinese original) Zbl 0996.53025
Chin. J. Contemp. Math. 20, No. 4, 533-542 (1999); translation from Chin. Ann. Math., Ser. A 20, No. 5, 647-654 (1999).
Reviewer: Weihuan Chen (Beijing)