壁かべ紙がみ群ぐん

noun

wallpaper group

A mathematical classification of two-dimensional repeating patterns, used in crystallography and geometry. Technical term in geology and mathematics.

• 壁かべ紙がみ群ぐんは、平へい面めんの対たい称しょう性せいを分ぶん類るいする数すう学がく的てきな概がい念ねんです。

  A wallpaper group is a mathematical concept that classifies the symmetries of the plane.