FUNDAMENTAL GROUPS OF SPLIT REAL KAC-MOODY GROUPS AND GENERALIZED REAL FLAG MANIFOLDS
FUNDAMENTAL GROUPS OF SPLIT REAL KAC-MOODY GROUPS AND GENERALIZED REAL FLAG MANIFOLDS
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分裂实 KAC-穆迪群和广义实旗流形的基本群
DOI:
10.1007/s00031-022-09719-7
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发表时间:
2022
影响因子:
0.7
通讯作者:
Ralf Köhl
中科院分区:
文献类型:
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作者:
Paula Harring;Ralf Köhl
We determine the fundamental groups of symmetrizable algebraically simply connected split real Kac-Moody groups endowed with the Kac-Peterson topology. In analogy to the finite-dimensional situation, because of the Iwasawa decompositionG=KAU+, the embedding K ,↪Gis a weak homotopy equivalence, in particularπ1(G) =π1(K). It thus suffices to determineπ1(K), which we achieve by investigating the fundamental groups of generalized ag varieties. Our results apply in all cases in which the Bruhat decomposition of the generalized ag variety is a CW decomposition- in particular, we cover the complete symmetrizable situation; furthermore, the results concerning only the structure ofπ1(K) actually also hold in the nonsymmetrizable two-spherical case.
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DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
Shrawan Kumar;Kac
通讯作者:
Kac
DOI:
--
发表时间:
2013
期刊:
影响因子:
--
作者:
Tobias Hartnick;R. Köhl;Andreas Mårs
通讯作者:
Andreas Mårs
影响因子:
0.5
作者:
P. Abramenko;K. S. Brown
通讯作者:
K. S. Brown
影响因子:
0.5
作者:
L. Kramer
通讯作者:
L. Kramer
DOI:
--
发表时间:
1967
期刊:
影响因子:
--
作者:
R. T. Ramsay
通讯作者:
R. T. Ramsay