Equations in HMN-extensions and amalgamated free products
(this work is in progress)

1. Rational subsets of HNN-extensions and amalgamated free products (with Géraud Sénizergues)
   see Journal papers
2. Equations in HNN-extensions (with Géraud Sénizergues)
   PS    PDF
3. Positive theories of HNN-extensions and amalgamated free products (with Géraud Sénizergues)
   PS    PDF