C. D. Papakyriakopoulos

1. On Dehn's Lemma and the Asphericity of Knots
   1957/07/01 by C. D. Papakyriakopoulos · 463 citations
   Mathematics · #Geometric and Algebraic Topology #Mathematical Dynamics and Fractals #Algebraic Geometry and Number Theory #Mathematics #Lemma (botany) #Dehn surgery #Knot (papermaking) #Pure mathematics #Combinatorics
2. ON DEHN'S LEMMA AND THE ASPHERICITY OF KNOTS
   1957/01/15 by C. D. Papakyriakopoulos · 63 citations
   Mathematics · #Geometric and Algebraic Topology #Homotopy and Cohomology in Algebraic Topology #Algebraic Geometry and Number Theory #Lemma (botany) #Combinatorics #Mathematics #Biology #Botany