We show that within the class of left-invariant naturally reductive metrics M(Nat)(G) on a compact simple Lie group G, every metric is spectrally isolated. We also observe that any collection of isospectral compact symmetric spaces is finite; this follows from a somewhat stronger statement involving only a finite part of the spectrum.
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Univ Turin, Dipartimento Matemat G Peano, Via Carlo Alberto 10, I-10123 Turin, ItalyUniv Turin, Dipartimento Matemat G Peano, Via Carlo Alberto 10, I-10123 Turin, Italy
Enrietti, Nicola
Fino, Anna
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Univ Turin, Dipartimento Matemat G Peano, Via Carlo Alberto 10, I-10123 Turin, ItalyUniv Turin, Dipartimento Matemat G Peano, Via Carlo Alberto 10, I-10123 Turin, Italy
机构:
Nankai Univ, Sch Math Sci, Tianjin 300071, Peoples R China
Nankai Univ, LPMC, Tianjin 300071, Peoples R ChinaNankai Univ, Sch Math Sci, Tianjin 300071, Peoples R China
Chen, Huibin
Chen, Zhiqi
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Nankai Univ, Sch Math Sci, Tianjin 300071, Peoples R China
Nankai Univ, LPMC, Tianjin 300071, Peoples R ChinaNankai Univ, Sch Math Sci, Tianjin 300071, Peoples R China
Chen, Zhiqi
Wolf, Joseph A.
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Univ Calif Berkeley, Dept Math, Berkeley, CA 94720 USANankai Univ, Sch Math Sci, Tianjin 300071, Peoples R China