- 17. NOVEMBER * August Ferdinand Mobius *

- 17. NOVEMBER * August Ferdinand Mobius *
321日　　あと44日
TOKYO_SUNRISE-06:18
SUNSET-16:33
MOON-12.2 DAYS

_ Arabian cobra becomes 12,000th animal added to ark of at-risk 
https://www.nationalgeographic.com/animals/article/arabian-cobra-milestone-species-in-photo-ark


将棋の日, ドラフト記念日, 蓮根の日, 国際学生の日(International Students' Day),
肺がん撲滅デー, 島原防災の日, 談山神社もみじ祭（奈良県桜井市）,

1790年 アウグスト・フェルディナント・メビウス (独:天文学者,数学者(トポロジー,整数論))
* August Ferdinand Mobius *
http://www.encyclopedia.com/doc/1G2-3407500199.html

_ Möbius and his Band - Professor Raymond Flood
https://youtu.be/-ECOwPNkoys
_ Möbius strip: Mathematical origami
https://youtu.be/wAMxuYqPTXI
_ Cutting a Möbius strip in half (and more) | Animated Topology |
https://youtu.be/XlQOipIVFPk



https://dilbert.com/strip/2021-11-16