blinryblinry@chaos.social
Oct 17, 2026, 12:09 PM#mathober day 17: Dimension Invariance
A coffee cup is a donut
but certainly not
a napkin
even one with a hole.
No matter how hard you
squish and stretch
R^2 and R^3 can't ever be
homeomorphic.
Replies
- blinryblinry@chaos.socialOct 18, 2026, 12:00 PM
#mathober day 18: Biflecnodal Point
Still traveling, and deprioritizing making big drawings! So here's a haiku! :)
One inflection point
on top of a second one
that's a biflecnode! - blinryblinry@chaos.socialOct 19, 2026, 12:16 PM
#mathober day 19: Orthic Triangle
find all heights of a triangle, connect their feet: orthic triangle
wear one as a child to straighten your teeth: orthodontic triangle
tool to help you find typos on a page of text: orthographic triangle
common bird classification system: ornithological triangle
seat profile that prevents hurting spines: orthopedic triangle
important doctrines after the great geometric schism: orthodox triangle
keyboard nerds love to type on these: ortholinear triangle
Oct 17, 2026, 12:54 PM@blinry
Dimension is the exact thing that homotopy forgets about
DerPumu (he/him)DerPumu@mstdn.gamesOct 18, 2026, 5:43 AM@blinry but only if it has one handle, right?
Daniel Bohrerdaniel_bohrer@chaos.socialOct 18, 2026, 1:10 PM@blinry when two inflections touch, it is called as such: that's biflecnode! 🎶
Fractal Kittyfractalkitty@mathstodon.xyzOct 19, 2026, 4:07 AM@blinry love the poetry :)
d@nny disc@hipsterelectron@circumstances.runOct 19, 2026, 12:20 PM@blinry i love love love your posts
- blinryblinry@chaos.socialOct 19, 2026, 12:22 PM
- Daniel Bohrerdaniel_bohrer@chaos.socialOct 19, 2026, 5:14 PM
@blinry shape of Isengart: Orthanc triangle
- Fractal Kittyfractalkitty@mathstodon.xyzOct 20, 2026, 4:14 AM
@blinry I feel like I need to doodle ornithological triangle
- this made my day
- blinryblinry@chaos.socialOct 20, 2026, 8:15 AM
@fractalkitty Also thought of you when writing that, of course! ;)