His 1898 thesis introduced a concept now called the Heegaard splitting of a 3-manifold.
Poul Anderson | Poul Nyrup Rasmussen | Poul F. Joensen | Poul Toft Jensen | Poul Ruders | Poul Reumert | Poul Petersen (actor) | Poul Pedersen | Poul Nielson | Poul Erik Petersen | Heegaard splitting |