Science4All (english) | The Poincaré conjecture | Relativity 21 @Science4allOrg | Uploaded 8 years ago | Updated 2 hours ago
Could a universe without border, not go on and on forever?
Poincaré not only gave an answer, he also proposed a fundamental conjecture...

Poincaré Conjecture and Homotopy | Science4All Article
http://www.science4all.org/le-nguyen-hoang/poincare-conjecture
Can you glue opposite edges of a square? Nash's embedding | Science4All 7
youtube.com/watch?v=Bx0MOMvUxS8
What's wrong with that map? Spherical Geometry | Science4All 9
youtube.com/watch?v=SZsz3EchTA0
Topology | MyWhyU
youtube.com/watch?v=p2ofJPh2yMw
youtube.com/watch?v=n8Sb29BSZcY
youtube.com/watch?v=29LoQVbEa7w
Poincaré Conjecture | Numberphile
youtube.com/watch?v=GItmC9lxeco
Ricci Flow | Numberphile
youtube.com/watch?v=hwOCqA9Xw6A
Euler’s Formula and the Utilities Problem | Science4All Article
http://www.science4all.org/le-nguyen-hoang/eulers-formula-and-the-utilities-problem
Homotopy Type Theory and Higher Inductive Types | Science4All Article
http://www.science4all.org/le-nguyen-hoang/homotopy-type-theory