Years ago, an audacious Fields medalist outlined a sweeping program that, he claimed, could be used to resolve a major ...

If a polycyclic-by-finite rank-K group Γ admits a faithful affine representation making it acting on R K properly discontinuously and with compact quotient, we say that Γ admits an affine structure.

Before being mortally wounded in a duel at age 20, Évariste Galois discovered the hidden structure of polynomial equations. By studying the relationships between their solutions — rather than the ...