The real cohomology of the space of imbeddings of S1 into ℝn, n > 3, is studied by using configuration space integrals. Nontrivial classes are explicitly constructed. As a by-product, we prove the nontriviality of certain cycles of imbeddings obtained by blowing up transversal double points in immersions. These cohomology classes generalize in a nontrivial way the Vassiliev knot invariants. Other nontrivial classes are constructed by considering the restriction of classes defined on the corresponding spaces of immersions.
Cattaneo, Alberto S  1 ; Cotta-Ramusino, Paolo  2 ; Longoni, Riccardo  3
@article{10_2140_agt_2002_2_949,
author = {Cattaneo, Alberto S and Cotta-Ramusino, Paolo and Longoni, Riccardo},
title = {Configuration spaces and {Vassiliev} classes in any dimension},
journal = {Algebraic and Geometric Topology},
pages = {949--1000},
year = {2002},
volume = {2},
number = {2},
doi = {10.2140/agt.2002.2.949},
url = {http://geodesic.mathdoc.fr/articles/10.2140/agt.2002.2.949/}
}
TY - JOUR AU - Cattaneo, Alberto S AU - Cotta-Ramusino, Paolo AU - Longoni, Riccardo TI - Configuration spaces and Vassiliev classes in any dimension JO - Algebraic and Geometric Topology PY - 2002 SP - 949 EP - 1000 VL - 2 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.2140/agt.2002.2.949/ DO - 10.2140/agt.2002.2.949 ID - 10_2140_agt_2002_2_949 ER -
%0 Journal Article %A Cattaneo, Alberto S %A Cotta-Ramusino, Paolo %A Longoni, Riccardo %T Configuration spaces and Vassiliev classes in any dimension %J Algebraic and Geometric Topology %D 2002 %P 949-1000 %V 2 %N 2 %U http://geodesic.mathdoc.fr/articles/10.2140/agt.2002.2.949/ %R 10.2140/agt.2002.2.949 %F 10_2140_agt_2002_2_949
Cattaneo, Alberto S; Cotta-Ramusino, Paolo; Longoni, Riccardo. Configuration spaces and Vassiliev classes in any dimension. Algebraic and Geometric Topology, Tome 2 (2002) no. 2, pp. 949-1000. doi: 10.2140/agt.2002.2.949
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