wallpaper group
A mathematical classification of two-dimensional repeating patterns, used in crystallography and geometry. Technical term in geology and mathematics.
壁紙群は、平面の対称性を分類する数学的な概念です。
A wallpaper group is a mathematical concept that classifies the symmetries of the plane.
Compound of 壁紙 (kabegami, 'wallpaper') and 群 (gun, 'group'), a direct translation of the English term 'wallpaper group'.