| EMBEDDED 2-SPHERES IN INDEFINITE 4-MANIFOLDS |
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| 作者姓名： | Gan Danyan |
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| 作者单位： | GAN DANYAN(Depedmellt of Mathematics and Center for Mathematical Sciences，Zhejiang University Hangzhou310027，China.)(Project supported by the National Natural Science Foundation of China and by the Zhejiang NaturalScience Foundation.) |
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| 摘 要： | 51.IntroductionOne0ftheinterestingproblemsneartheheartof4dimensionaltopologyistodecidewhich2-dimensionalhomology/homotoPyclasscanberepresentedbyasmo0thlyembedded2-sphereinagivensmooth4-dimensionalmanifold.ItwasRohlin19]wh0pointed0utintheearly195Ostousthatnotevery2-dimensionalhthmology/hom0topyclasscanbesorepresented.TheimportanceoftheproblemwasexplainedbyKervaireandMilnorl11].Onedecadelater,theystartedthestudyin1961,followedbyBoardm..I1]?Wall25]5Tri.t..m23]tHsiangandSzczarba1o],andRoh…
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| 关 键 词： | 拓扑学 模糊数学 4维流形 2维异体同形 不确定性 |
| 收稿时间： | 1995/7/29 0:00:00 |
EMBEDDED 2-SPHERES IN INDEFINITE 4-MANIFOLDS |
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| Gan Danyan.EMBEDDED 2-SPHERES IN INDEFINITE 4-MANIFOLDS[J].Chinese Annals of Mathematics,Series B,1996,17(3):257-262. |
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| Authors: | Gan Danyan |
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| Institution: | DepartmentofMathematicsandCenterforMathematicalSeciences,ZhejiangUniversity,Hangzhou310027,China. |
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| Abstract: | The main results are as follows. |
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| Keywords: | Representing Characteristic Ordinary Primitive |
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