The Theory of (N, +, Vk, V1) is Undecidable

Roger Villemaire. The Theory of (N, +, Vk, V1) is Undecidable. Theoretical Computer Science, 106(2):337-349, 1992.

@article{Villemaire92:1,
  title = {The Theory of (N, +, Vk, V1) is Undecidable},
  author = {Roger Villemaire},
  year = {1992},
  researchr = {https://researchr.org/publication/Villemaire92%3A1},
  cites = {0},
  citedby = {0},
  journal = {Theoretical Computer Science},
  volume = {106},
  number = {2},
  pages = {337-349},
}