2 papers
math.AG2024
Explicit bounds on common projective torsion points of elliptic curves
Christian Böhning, Hans-Christian Graf von Bothmer, David Hubbard
Suppose E_1, E_2 are elliptic curves (over the complex numbers) together with standard double coverings of the projective line identifying a point and its inverse on E_i. Bogomolov…
math.AG2024
Roots of unity and projective equivalence
David Hubbard
Existing results of Fu show that, if two finite sets of roots of unity are projectively equivalent by a projective automorphism that does not act bijectively on the set of all root…