Index of a singular point of a vector field or of a 1-form on an orbifold

التفاصيل البيبلوغرافية
العنوان: Index of a singular point of a vector field or of a 1-form on an orbifold
المؤلفون: Gusein-Zade, S. M.
سنة النشر: 2019
المجموعة: Mathematics
مصطلحات موضوعية: Mathematics - Geometric Topology, 57R18, 55M35, 58K45
الوصف: Indices of singular points of a vector field or of a 1-form on a smooth manifold are closely related with the Euler characteristic through the classical Poincar\'e--Hopf theorem. Generalized Euler characteristics (additive topological invariants of spaces with some additional structures) are sometimes related with corresponding analogues of indices of singular points. Earlier there was defined a notion of the universal Euler characteristic of an orbifold. It takes values in a ring R, as an abelian group freely generated by the generators, corresponding to the isomorphism classes of finite groups. Here we define the universal index of an isolated singular point of a vector field or of a 1-form on an orbifold as an element of the ring R. For this index, an analogue of the Poincar\'e-Hopf theorem holds.
نوع الوثيقة: Working Paper
URL الوصول: http://arxiv.org/abs/1903.06978
رقم الأكسشن: edsarx.1903.06978
قاعدة البيانات: arXiv