Some Homotopy Groups of the Homogeneous Space E 6 /F 4
Some Homotopy Groups of the Homogeneous Space E 6 /F 4
复制标题
齐次空间E 6 /F 4 的一些同伦群
DOI:
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发表时间:
2003
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影响因子:
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通讯作者:
Y. Hirato
中科院分区:
文献类型:
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作者:
Y. Hirato
Let F4 and E6 be the compact, connected, simply connected, simple, exceptional Lie groups of rank 4 and 6 respectively. We consider the homogeneous space E6/F4. Cohen and Selick constructed in [3] a map λ : Ω2S17 → ΩS9 which is ad(σ9) on the bottom cell where ad : π16(S) → π15(ΩS) is an adjoint isomorphism and σ9 a generator of π16(S). They also showed that there does not exist a spherical fibration S9 → E → S17 giving rise to the λ. Thus the homotopy fibre of λ is expected to be homotopy equivalent to Ω(E6/F4). Conlon has determined πi(E6/F4) for i ≤ 23 in [2]. In this paper we calculate πi(E6/F4 : 2) for i ≤ 39 where we denote by πi(Y : p) the pprimary component of πi(Y ). The calculation will be done by making use of the fibration