In this paper, the semi-symmetric recurrent-metric S-concircular connec-tion on a Riernannian manifold are defined. Some......

讨论了半对称度量循环联络的截面曲率，定义一类半对称度量循环联络，证明了Ｓｃｈｕｒ定理成立，并导出某些性质。......

<正> 设(M_n,g)是n维(n>2)黎曼流形,其黎曼联络记为。令D是M上的光滑线性联络,若对任意的光滑向量场X、Y、Z,有......