If it doesn't have a hole, it's a sphere. Obviously.
The first Millennium Problem I will be exploring is the Poincaré Conjecture. In the early 1900s, a mathematician by the name of Henri Poincaré stated a hypothesis regarding a field called topology. Although many agreed with him, no one could actually prove that his conjecture was true for many decades. Therefore, one of the Millennium Problems became proving or disproving the truth of what became known as the Poincaré Conjecture.
0