lake of Wada
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English
[edit]Etymology
[edit]Calque of Japanese 和田の湖. Introduced by Kunizo Yoneyama (in 1917), who credited the discovery to Takeo Wada.
Noun
[edit]lake of Wada (plural lakes of Wada)
- (mathematics) Any of three disjoint connected open sets of the plane or open unit square with the counterintuitive property that they all have the same boundary.