摘要: Let f:S1→M2 or M2→N3 be a map, we classify the immersions homotopic to f, where M2 and N3 are arbitrary surface and 3-manifolds respectively.
李邦河. CODIMENSION 1 IMMERSIONS OF THE CIRCLE AND SURFACES[J]. 数学物理学报(英文版), 1988, 8(4): 409-419.
Li Banghe. CODIMENSION 1 IMMERSIONS OF THE CIRCLE AND SURFACES[J]. Acta mathematica scientia,Series B, 1988, 8(4): 409-419.