A Dirichlet space is a type of Hilbert space that arises in the study of Dirichlet forms and potential theory. These spaces have applications in various areas of analysis, including the theory of harmonic functions and partial differential equations. A Dirichlet space can be defined as follows: 1. **Function Space**: A Dirichlet space is typically formed from a collection of functions defined on a domain, often a subset of Euclidean space or a more general manifold.
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