*1:See also https://sumita-m.hatenadiary.com/entry/20170412/1491977281 https://sumita-m.hatenadiary.com/entry/20170422/1492821823 https://sumita-m.hatenadiary.com/entry/2020/03/02/011405 https://sumita-m.hatenadiary.com/entry/2022/04/21/091730 https://sumita-m.hatenadiary.com/entry/2022/08/10/072658 https://sumita-m.hatenadiary.com/entry/2023/05/02/110814 https://sumita-m.hatenadiary.com/entry/2025/02/09/155936
