Abstract.
In this paper we define two regular homotopy invariants c and i for immersions of oriented 3-manifolds into ℝ5 in a geometric manner. The pair (c(f), i(f)) completely describes the regular homotopy class of the immersion f. The invariant i corresponds to the 3-dimensional obstruction that arises from Hirsch-Smale theory and extends the one defined in [10] for immersions with trivial normal bundle.
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Mathematics Subject Classification (2000): 57N35, 57R45, 57R42
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Juhász, A. A geometric classification of immersions of 3-manifolds into 5-space. manuscripta math. 117, 65–83 (2005). https://doi.org/10.1007/s00229-005-0543-8
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DOI: https://doi.org/10.1007/s00229-005-0543-8