Hisconjecture, made in 1904, was that in this four-dimensional world, allclosedthree-dimensionalsurfacesthat are simply connected could betransformed to look like athree-dimensionalsphere.
The equation smoothes out the irregularities of an object, transforming it mathematically into something that looks like a uniform three-dimensional sphere.
His conjecture, made in 1904, was that in this four-dimensional world, all closed three-dimensional surfaces that are simply connected could be transformed to look like a three-dimensional sphere.