*1:See also https://sumita-m.hatenadiary.com/entry/20120310/1331389760 https://sumita-m.hatenadiary.com/entry/2021/03/21/075634 https://sumita-m.hatenadiary.com/entry/2022/04/08/004846 https://sumita-m.hatenadiary.com/entry/2023/01/22/093345 https://sumita-m.hatenadiary.com/entry/2023/03/23/123036 https://sumita-m.hatenadiary.com/entry/2024/04/09/123255 https://sumita-m.hatenadiary.com/entry/2024/04/15/131753 https://sumita-m.hatenadiary.com/entry/2024/04/20/033725
