Generalized Gauduchon metrics on compact complex spaces

Abstract: Let $X$ be an irreducible reduced compact complex space of dimension $n$, and let $ω$ be a Hermitian metric on $X$. For each $1\le k\le n-1$, we prove that there exist a constant $c_k$ and a smooth positive function $ρ$ on $X_{\mathrm{reg}}$ such that $\ii\partial\bar\partial(ρω<sup>k)\wedgeω<sup>{n-k-1}=c_kρω<sup>n$. The function $ρ$ is bounded above and bounded away from zero. The constant $c_k$ is unique, and $ρ$ is unique up to a positive multiple among bounded smooth positive solutions. We also prove that the full sign set ${-1,0,1}$ of the generalized Gauduchon constants $c_k$ on a compact complex manifold is preserved by finite sequences of blow-ups with smooth centers.