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| Some Examples of Metrics with Positive Curvature and Negative Curvature on R￣n | |
| 作者姓名： | 朱大新 侯文华 宋清芳 |
| 作者单位： | Zhu Daxin; Hou Wenhua(Department of Mathematics，Tianjin University，Tianjin 300072，P. R. China)Song Qingfang(Henan University ) |
| 摘 要： | ＳｏｍｅＥｘａｍｐｌｅｓｏｆＭｅｔｒｉｃｓｗｉｔｈＰｏｓｉｔｉｖｅＣｕｒｖａｔｕｒｅａｎｄＮｅｇａｔｉｖｅＣｕｒｖａｔｕｒｅｏｎＲ￣ｎ￥ＺｈｕＤａｘｉｎ；ＨｏｕＷｅｎｈｕａ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｈｅｍａｔｉｃｓ，ＴｉａｎｊｉｎＵｎｉｖｅｒｓ... |
| 本文献已被 CNKI 等数据库收录！ | |