duplication of the cube
(Australia) A tall rainforest tree of eastern Australia (Sloanea australis: Oxalidales). / (Australia) silver ash, bumpy ash (Flindersia schottiana), a tree of Queensland.
plural of dolphinarium
(mathematics) The operation of finding a cube having a volume which is double that of a given cube.
Reminiscent of the Biblical prophet Jonah, who was cast into the sea and swallowed by a great fish.
与えられた立方体の体積を2倍にする立方体を見つける問題は、定規とコンパスだけでは達成できないため、何世紀にもわたって数学者たちを悩ませた。
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