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Homoeoid
A homoeoid is a shell (a bounded region) bounded by two concentric, similar ellipses (in 2D) or ellipsoids (in 3D). When the thickness of the shell becomes negligible, it is called a thin homoeoid. ==Mathematical definition== If the outer shell is given by : with semiaxes the inner shell is given for by :. The thin homoeoid is then given by the limit
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Homoeoid」の詳細全文を読む
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