Let (X,d,μ)\documentclass[12pt]{minimal}
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\begin{document}$$({{\mathcal {X}}},d,\mu )$$\end{document} be a metric measure space of homogeneous type in the sense of Coifman and Weiss. In this article, the authors prove that the commutator, generated by any b∈BMO(X)\documentclass[12pt]{minimal}
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\begin{document}$$b\in \mathrm {BMO}({\mathcal {X}})$$\end{document} and any Calderón–Zygmund operator, is bounded from the Hardy type space Hb1(X)\documentclass[12pt]{minimal}
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\begin{document}$$H^1_b({\mathcal {X}})$$\end{document} to the local Hardy space Hρ1(X)\documentclass[12pt]{minimal}
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\begin{document}$$H^1_{\rho }({\mathcal {X}})$$\end{document} associated with an admissible function ρ\documentclass[12pt]{minimal}
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\begin{document}$$\rho $$\end{document}, where Hb1(X)\documentclass[12pt]{minimal}
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\begin{document}$$H^1_b({\mathcal {X}})$$\end{document} is the largest subspace of the Hardy space H1(X)\documentclass[12pt]{minimal}
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\begin{document}$$H^1({\mathcal {X}})$$\end{document} that ensures the boundedness of commutators from Hb1(X)\documentclass[12pt]{minimal}
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\begin{document}$$H^1_b({\mathcal {X}})$$\end{document} to L1(X)\documentclass[12pt]{minimal}
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\begin{document}$$L^1({\mathcal {X}})$$\end{document}. Moreover, the authors investigate the relations between the Hardy space HL1(Rn)\documentclass[12pt]{minimal}
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\begin{document}$$H^1_L({\mathbb {R}}^n)$$\end{document} associated with the Schrödinger operator L and the local Hardy space h1(Rn)\documentclass[12pt]{minimal}
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\begin{document}$$h^1({\mathbb {R}}^n)$$\end{document}. The major novelties of this article are that the main result even essentially improves the corresponding Euclidean case and, throughout this article, μ\documentclass[12pt]{minimal}
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\begin{document}$$\mu $$\end{document} is not assumed to satisfy the reverse doubling condition.
