3 papers
math.AG2018
An algorithmic approach to the Polydegree Conjecture for plane polynomial automorphisms
Drew Lewis, Kaitlyn Perry, Armin Straub
We study the interaction between two structures on the group of polynomial automorphisms of the affine plane: its structure as an amalgamated free product and as an infinite-dimens…
math.AG2017
Normal subgroups generated by a single polynomial automorphism
Drew Lewis
We study criteria for deciding when the normal subgroup generated by a single polynomial automorphism of is as large as possible, namely equal to the normal closure…
math.AG2017
Co-tame polynomial automorphisms
Eric Edo, Drew Lewis
A polynomial automorphism of over a field of characteristic zero is called co-tame if, together with the affine subgroup, it generates the entire tame subgroup. We p…