...Therefore, there are 11 types of spirals : 21 , 31 , 32, 41 , 42 , 43 , 61 , 62 , 63 , 64 , 65. As shown in Figure 13, among these, 31 and 32 , 41 and 43 , 61 and 65, and 62 and 64 have two in each pair that are clockwise and counterclockwise, and 42 , 62 , and 64 also serve as 2, and 63 also serves as 3. *Some of the terminology explanations that mention "gliding symmetry" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…したがって,らせんには21,31,32,41,42,43,61,62,63,64,65の11種類があり,図13で示すように,これらの中で31と32,41と43,61と65および62と64とはそれぞれの対の中の二つが右回りと左回りの関係にあり,また42と62と64は2を兼ね,63は3を兼ねている。 ※「映進対称」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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