EMBEDDINGS OF SURFACES IN 4-MANIFOLDS (Ⅱ)  

作　　者：李邦河 

机构地区：[1]Institute of Systems Science, Academia Sinica, Beijing 100080, PRC

出　　处：《Chinese Science Bulletin》1991年第24期2025-2029,共5页

基　　金：Project supported partially by the National Natural Science Foundation of China

摘　　要：Ⅰ. INTRODUCTION In this report, we study differentiable embeddings of S² and nonorientable surfaces in simply connected closed 4-manifolds, For S², we only consider the problem,i.e, which homotopy classes of S² to M⁴ include embeddings, or equivalently, which classes in H₂（M⁴）

关 键 词：EMBEDDING CHARACTERISTIC CLASS PRIMITIVE ordinary CLASS 

分 类 号：N[自然科学总论]