*1:See also https://sumita-m.hatenadiary.com/entry/2021/03/13/040455 https://sumita-m.hatenadiary.com/entry/2021/11/26/160357 https://sumita-m.hatenadiary.com/entry/2022/01/13/102150 https://sumita-m.hatenadiary.com/entry/2022/03/14/144654 https://sumita-m.hatenadiary.com/entry/2022/04/02/112305 https://sumita-m.hatenadiary.com/entry/2022/04/08/093843
*2:See eg. https://ja.wikipedia.org/wiki/%E5%B0%8F%E9%87%8E%E5%B7%9D_(%E5%8D%83%E8%91%89%E7%9C%8C)
*3:See also https://sumita-m.hatenadiary.com/entry/2022/04/02/112305 https://sumita-m.hatenadiary.com/archive/2022/04/02
