Good afternoon, sir.😃 Ms. Rei Kikukawa, who is appearing in this show, is a talented woman who graduated from the architecture department of the University of Tokyo. 😍The mathematical formula in the contrast is a limit that represents an extremum. In Japan, it is the differential and integral calculus learned in high school mathematics. There is also a version of Ms. Danmitsu in this Snow Woman Contest, so please check it out as well!🙂