/sci/ - Science & Math

Nikolaj, if you're still here:
You can roll the ball on the projective plane to get a discrete equivalence class.

No idea why I didn't notice this earlier. It doesn't even contradict the isometry thing.

>>11786196
FUCK, I can't make it work either with just intermediate value.
If you identify all [math](x, 0) \in S^1 \times [0, 1][/math], you get a disk (might be easier to think of it as a cone), and the embedding becomes a Jordan closed curve, and then the boundary of the curve can't have winding number different from 1 around 0, so its homotopy class isn't [math]a^2[/math].

>>11260572
Can't delete posts that late, lad.

>>11177253
>feel better <3 go to bed early and eat a healthy breakfast
Anon, I did bad.
I did pretty bad.
Still passing, tho.

>>11154070
>50 years later
Old man anon.
>>11152418
I only answer the really easy questions because no one else does and the professor starts looking at the class like we're retarded.

>>10229213
>R[e]=R[x]/(x^2)