Albert Marden (born 18 November 1934) is an American mathematician, specializing in complex analysis and hyperbolic geometry.
Marden received his PhD in 1962 from Harvard University with thesis advisor Lars Ahlfors.
[2] His research deals with Riemann surfaces, quadratic differentials, Teichmüller spaces, hyperbolic geometry of surfaces and 3-manifolds, Fuchsian groups, Kleinian groups, complex dynamics, and low-dimensional geometric analysis.
Concerning properties of hyperbolic 3-manifolds, Marden formulated in 1974 the tameness conjecture,[3] which was proved in 2004 by Ian Agol and independently by a collaborative effort of Danny Calegari and David Gabai.
[4] In 1962, he gave a talk (as an approved speaker but not an invited speaker) on A sufficient condition for the bilinear relation on open Riemann surfaces at the International Congress of Mathematicians in Stockholm.