Mathematical Contributions
His contributions include a proof of the Smale conjecture for the 3-sphere and important results in the theory of pseudoisotopy, k-theory, surfaces and 3-manifolds.
Read more about this topic: Allen Hatcher
Famous quotes containing the word mathematical:
“An accurate charting of the American woman’s progress through history might look more like a corkscrew tilted slightly to one side, its loops inching closer to the line of freedom with the passage of time—but like a mathematical curve approaching infinity, never touching its goal. . . . Each time, the spiral turns her back just short of the finish line.”
—Susan Faludi (20th century)