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## $H^1$ and BMO for certain locally doubling metric measure spaces of finite measure

### Tom 118 / 2010

Colloquium Mathematicum 118 (2010), 13-41 MSC: 42B20, 42B30, 46B70, 58C99. DOI: 10.4064/cm118-1-2

#### Streszczenie

In a previous paper the authors developed an $H^1\hbox{-BMO}$ theory for unbounded metric measure spaces $(M,\rho,\mu)$ of infinite measure that are locally doubling and satisfy two geometric properties, called “approximate midpoint” property and “isoperimetric” property. In this paper we develop a similar theory for spaces of finite measure. We prove that all the results that hold in the infinite measure case have their counterparts in the finite measure case. Finally, we show that the theory applies to a class of unbounded, complete Riemannian manifolds of finite measure and to a class of metric measure spaces of the form $(\mathbb R^d,\rho_\varphi, \mu_\varphi)$, where ${\rm d}\mu_\varphi = {\rm e}^{-\varphi}\,{\rm d} x$ and $\rho_\varphi$ is the Riemannian metric corresponding to the length element ${\rm d} s^2=(1+|\nabla\varphi|)^2 ({\rm d} x_1^2 +\cdots+{\rm d} x_d^2)$. This generalizes previous work of the last two authors for the Gauss space.

#### Autorzy

• Andrea CarbonaroDipartimento di Matematica
Università di Genova
via Dodecaneso 35, 16146 Genova, Italy
e-mail
• Giancarlo MauceriDipartimento di Matematica
Università di Genova
via Dodecaneso 35, 16146 Genova, Italy
e-mail
• Stefano MedaDipartimento di Matematica e Applicazioni
Università di Milano-Bicocca
via R. Cozzi 53
20125 Milano, Italy
e-mail

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