Quantitative nullhomotopy and rational homotopy type
Quantitative nullhomotopy and rational homotopy type
复制标题
定量零同伦型和有理同伦型
DOI:
10.1007/s00039-018-0450-2
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发表时间:
2018
影响因子:
2.2
通讯作者:
Weinberger, Shmuel
中科院分区:
文献类型:
--
作者:
Chambers, Gregory R.;Manin, Fedor;Weinberger, Shmuel
In a 2014 survey, Gromov asks the following question: given a nullhomotopic mapof Lipschitz constantL, how does the Lipschitz constant of an optimal nullhomotopy offdepend onL,m, andn? We establish that for fixedmandn, the answer is at worst quadratic inL. More precisely, we construct a nullhomotopy whosethickness(Lipschitz constant in the space variable) isC(m,n)(L+ 1) and whosewidth(Lipschitz constant in the time variable) isC(m,n)(L+ 1)2. More generally, we prove a similar result for mapsfor any compact Riemannian manifoldXandYa compact simply connected Riemannian manifold in a class which includes complex projective spaces, Grassmannians, and all other simply connected homogeneous spaces. Moreover, for all simply connectedY, asymptotic restrictions on the size of nullhomotopies are shown to be determined by rational homotopy type.
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DOI:
--
发表时间:
1967
期刊:
影响因子:
--
作者:
T. Ganea
通讯作者:
T. Ganea
影响因子:
0.9
作者:
M. Mimura;H. Toda
通讯作者:
H. Toda
影响因子:
2.5
作者:
M. Gromov
通讯作者:
M. Gromov
影响因子:
0.9
作者:
R. Body;M. Mimura;H. Shiga;D. Sullivan
通讯作者:
D. Sullivan
DOI:
--
发表时间:
2014
期刊:
影响因子:
--
作者:
Fedor Manin
通讯作者:
Fedor Manin