• Brill–Noether theory of squarefree modules supported on a graph 

      Fløystad, Gunnar; Lohne, Henning (Peer reviewed; Journal article, 2013-05)
      We investigate the analogy between squarefree Cohen- Macaulay modules supported on a graph and line bundles on a curve. We prove a Riemann–Roch theorem, we study the Jacobian and gonality of a graph, and we prove Clifford’s ...
    • Pre- and post-lie algebras: The algebro-geometric view 

      Fløystad, Gunnar; Munthe-Kaas, Hans (Conference object; Peer reviewed; Journal article, 2019)
      We relate composition and substitution in pre- and post-Lie algebras to algebraic geometry. The Connes-Kreimer Hopf algebras and MKW Hopf algebras are then coordinate rings of the infinite-dimensional affine varieties ...