41
/
AIzaSyB4mHJ5NPEv-XzF7P6NDYXjlkCWaeKw5bc
May 31, 2026
6778171
646914
2
Public Timelines
FAQ

aug 18, 1642 - Seki Takakazu, "Japan's Newton"

Description:

Sangaku Geometry

Added to timeline:

Date:

aug 18, 1642
Now
~ 384 years ago