Identifiability and Observability in Epidemiological Models : A Primer
Kentaro Hirata, Tetsuya Ishiwata, Shigetoshi Yazaki, Shigeaki Koike uameeting entitled Mathematical Physics and Its Interactions, originally scheduled to
be held 25–27 August 2021. The meeting would have a special significance, as it
was to be a celebration of Professor Tohru Ozawa’s 60th birthday.
Preparations had been underway for about 2 years prior to the planned meeting,
before the news of COVID-19. In March 2020, many schools, including universi-
ties, were closed in Japan. For a long time afterward, many events such as research
meetings were canceled. We are grateful to the authors of this volume for their will-
ingness to participate as speakers in 2021 even though news of COVID-19 continued
to appear in the media and many people were reluctant to attend. In actuality, however,
the reality of vaccines became an issue that could not be ignored, and on 23 April of
that year, we announced the cancellation of the meeting. This collection of reports
is therefore the only evidence of the existence of this meeting that would have taken
place.