Connected sum

[@kosolapovlev6029]

when I watched this for the first time, the idea that all vertices are the same point caused a lot of confusion.

[@GuillermoValleCosmos]

These videos are great. Thanks for making them!

[@Nemeciss33]

You are amazing, sir. Thank you!

[@minghuiliu451]

Just curious: Is there a nice analogue to represent the idea of "cut and paste" 3-manifolds? I understand that classification of 3-manifolds will be much much much much harder (if not unsolvable), but at least one can construct the connect sum etc.

[@HarpreetBedimath]

See Scorpan's "Wild World of 4-Manifolds"

[@decemberelegy]

Thank you so much for this video!

[@dhaka_mathematical_school]

Wow! Amazing lecture!

[@nagesh1805]

You are awesome!

[@kitykat556]

bless ur soul

[@timelsen2236]

very helpful

[@marwaassem1087]

Thank you very much :)

[@MarthamadaySaamanu]

It's not clear to me as to why the connected sum is associative.

[@sonumeena2300]

thanks sir