Differential geometry and global analysis : in honor of Tadashi Nagano : AMS Special Session Differential Geometry and Global Analysis, Honoring the Memory of Tadashi Nagano (1930-2017) January 16, 2020, Denver, Colorado / Bang-Yen Chen, Nicholas D. Brubaker, Takashi Sakai, Bogdan D. Suceavă, Makiko Sumi Tanaka, Hiroshi Tamaru, Mihaela B. Vâjiac, editors