Visual Group Theory关于群的定义,没有提到恒等操作,直到第四章才提到恒等操作。对于魔方来说,恒等操作就是灵魂。 魔方推群论/Visual Group Theory:我对群的论述 vs §1.4 Rules of a group_哔哩哔哩_bilibili 本节贴出 Visual Group Theory 的 § 1 .4 Rules of a group ,实际 ...
Icosahedral symmetry: multiple twinning of 20 rhombohedral cells https://www.youtube.com/channel/UCeNplibjHdednjiqUY4IcEg https://www.youtube.com/channel/UCeNplibjHdednjiqUY4IcEg https://www.youtube.com/watch?v=mg1-18jqcbg 1 Shechtman, D., I. Blech, D. Gratias, ...
N represents the counting of twisting for the operation sequence C represents the cyclic periodicity of employing the operation sequence T represents the side of twisting currently RC represents the angle of twisting currently N=,1, C=,1, T ...