*1:See also https://sumita-m.hatenadiary.com/entry/20161016/1476581776 https://sumita-m.hatenadiary.com/entry/2019/11/15/030331https://sumita-m.hatenadiary.com/entry/2019/11/21/163607 https://sumita-m.hatenadiary.com/entry/2020/12/30/110126
*2:See also https://sumita-m.hatenadiary.com/entry/2020/06/02/175314 https://sumita-m.hatenadiary.com/entry/2020/07/06/092410 https://sumita-m.hatenadiary.com/entry/2021/01/05/093413 https://sumita-m.hatenadiary.com/entry/2021/01/07/134356 https://sumita-m.hatenadiary.com/entry/2021/09/29/131340 https://sumita-m.hatenadiary.com/entry/2021/10/13/082558
