Precise estimate of the 2-capacity of a condenser
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- Zorii, N.V. Ukr Math J (1990) 42: 224. doi:10.1007/BF01071019
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For quite a large class of condensers E (including, in particular, all space annuli) greatest lower bounds for their 2-capacity are obtained in terms of the Newtonian capacity of certain sets associated with E. A class of condensers for which equality is achieved in the bound is described completely.