Biquotient vector bundles with no inverse
Biquotient vector bundles with no inverse
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无逆的双商向量丛
DOI:
10.1007/s00209-022-03095-4
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发表时间:
2022
影响因子:
0.8
通讯作者:
González-Álvaro, David
中科院分区:
文献类型:
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作者:
DeVito, Jason;González-Álvaro, David
In previous work, the second author and others have found conditions on a homogeneous spaceG/Hwhich imply that, up to stabilization, all vector bundles overG/Hadmit Riemannian metrics of non-negative sectional curvature. One important ingredient of their approach is Segal’s result that the set of vector bundles of the formfor a representationVofHcontains inverses within the class. We show that this approach cannot work for biquotients, where we consider vector bundles of the form. We call such vector bundles biquotient bundles. Specifically, we show that in each dimensionexcept, there is a simply connected biquotient of dimensionnwith a biquotient bundle which does not contain an inverse within the class of biquotient bundles. In addition, we show that forexcept, there are infinitely many homotopy types of biquotients with the property that no non-trivial biquotient bundle has an inverse. Lastly, we show that every biquotient bundle over every simply connected biquotientwithGsimply connected and withhas an inverse in the class of biquotient bundles.
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