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arXiv 1505.04465math.GRmath.GT
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相对双曲群的有界上同调刻划

A characterization of relatively hyperbolic groups via bounded cohomology

Federico Franceschini

摘要:

Mineyev和Yaman证明了,如果$(Γ, Γ')$是相对双曲对,则比较映射$$ H_b^k(Γ, Γ'; V) \to H^k(Γ, Γ'; V) $$对每个$k \ge 2$和任何有界$Γ$ -模$V$都是满射的.利用Groves和Manning的结果,给出了这个结果的另一个证明.此外,我们证明了相反的含义下弱的假设比Mineyev和Yaman所要求的。

英文摘要:

It was proved by Mineyev and Yaman that, if $(Γ, Γ')$ is a relatively hyperbolic pair, the comparison map $$ H_b^k(Γ, Γ'; V) \to H^k(Γ, Γ'; V) $$ is surjective for every $k \ge 2$, and any bounded $Γ$--module $V$. By exploiting results of Groves and Manning, we give another proof of this result. Moreover, we prove the opposite implication under weaker hypotheses than the ones required by Mineyev and Yaman.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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