Abstract
An annular region is a set of the form {x ∈ R n : r 0 < |x| < r 1}; here r 0 ∈ [0, ∞) and r 1 ∈ (0, ∞]. Thus an annular region is the region between two concentric spheres, or is a punctured ball, or is the complement of a closed ball, or is R n \ {0}.
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© 2001 Springer Science+Business Media New York
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Axler, S., Bourdon, P., Ramey, W. (2001). Annular Regions. In: Harmonic Function Theory. Graduate Texts in Mathematics, vol 137. Springer, New York, NY. https://doi.org/10.1007/978-1-4757-8137-3_10
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DOI: https://doi.org/10.1007/978-1-4757-8137-3_10
Publisher Name: Springer, New York, NY
Print ISBN: 978-1-4419-2911-2
Online ISBN: 978-1-4757-8137-3
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