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for questions on configuration spaces, both in the sense of spaces that parameterizes collections of points in a manifold, and in the sense of the space of possible states of a classical mechanical physical system.

11 votes
Accepted

Relation between cohomology of ordered and unordered configuration spaces?

If $F_n(M)$ denotes the ordered configuration space and $C_n(M)$ the unordered configuration space, the quotient map gives a map $$H^*(C_n(M)) \longrightarrow H^*(F_n(M)).$$ If one takes rational coef …
Oscar Randal-Williams's user avatar
7 votes
Accepted

Mixed Hodge structure on configuration spaces

In fact the conclusion in Gorinov's paper seems to be false, see E. Looijenga, "Torelli group action on the configuration space of a surface", arXiv:2008.10556
Oscar Randal-Williams's user avatar