In the mathematical subject of group theory, the Hanna Neumann conjecture is a statement about the rank of the intersection of two finitely generated subgroups of a free group. The conjecture was posed by Hanna Neumann in 1957. In 2011, the conjecture was proved independently by Igor Mineyev and Joel Friedman.
Read more about Hanna Neumann Conjecture: History, Formal Statement, Strengthened Hanna Neumann Conjecture, Partial Results and Other Generalizations, See Also
Famous quotes containing the words hanna, neumann and/or conjecture:
“Yabba dabba do!”
—William Denby Hanna (b. 1910)
“What a lesson here for our world. One blast, thousands of years of civilization wiped out.”
—Kurt Neumann (1906–1958)
“There is something fascinating about science. One gets such wholesale returns of conjecture out of such a trifling investment of fact.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)