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
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