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math.AT2021
The multiple points of maps from sphere to Euclidean space
Jun Wang, Xuezhi Zhao
In this paper, we obtain some sufficient conditions to guarantee the existence of multiple points of maps from to . Our main tool is the ideal-valued index of $…
math.AT2019
On generalized configuration space and its homotopy groups
Jun Wang, Xuezhi Zhao
Let be a subset of vector space or projective space. The authors define the \emph{generalized configuration space} of which is formed by -tuples of elements of where…