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Homogeneous Einstein Metrics and Butterflies

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arxiv 2107.06609 v2 pith:UQJUPB2Z submitted 2021-07-14 math.DG

classification math.DG
keywords citecompacteinsteingraevhomogeneousnerveassociatedbutterflies
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abstract

M.~M.~Graev associated in \cite{Gr} to a compact homogeneous space $G/H$ a nerve $\XGH$, whose non-contractibility implies the existence of a $G$-invariant Einstein metric on $G/H$. The nerve $\XGH$ is a compact semi-algebraic set, defined purely Lie theoretically by intermediate subgroups. In this paper we present a detailed description of the work of Graev and the curvature estimates of \cite{Bo}.

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  1. TACTIC: Task-Agnostic Contrastive pre-Training for Inter-Agent Communication

    cs.MA 2025-01 conditional novelty 6.0 of 10

    TACTIC uses offline contrastive pretraining, aligning integrated local observations and messages with each agent's egocentric state, to improve multi-agent coordination across varied sight ranges on SMACv2.

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