Tian's $α_{m,k}^{\hat K}$-invariants on group compactifications

In this paper, we compute Tian's $α_{m,k}^{K\times K}$-invariant on a polarized $G$-group compactification, where $K$ denotes a maximal compact subgroup of a connected complex reductive group $G$. We prove that Tian's conjecture (see Conjecture 1.1 below) is true for $α_{m,k}^{K\times K}$-invariant on such manifolds when $k=1$, but it fails in general by producing counter-examples when $k\ge 2$.

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