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/sci/ - Science & Math

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>> No.12770547 [View]
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12770547

>what a bunch of made up shit

>> No.11950083 [View]
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11950083

Yeah, no.

>> No.11890880 [View]
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11890880

>> No.9796456 [View]
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9796456

>>9796083
so basically the question is: for a person living on the surface of a sphere, how you you prove you're not living on the surface of a doughnut?
this should be trivial to disprove for a veteran topologist

you could measure intrinsic curvature by drawing triangles (sphere has anywhere positive curvature, doughnuts do not.

also doughnuts have a whole in them, so you can create a loop that cannot be contracted in on itself.

>> No.9325344 [View]
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9325344

https://www.youtube.com/watch?v=uexZbunD7Jg

>> No.9202751 [View]
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9202751

>>9202621
Non-Euclidean geometry.

>> No.9194631 [View]
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9194631

>>9194602
an important point to observe here is that the 2d anon can measure that his world has non-zero curvature by, for example, measuring the angles of a triangle.
so he doesnt have to assume any extra dimensions to prove that his 2d-space is curved

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