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Cross-constraint basis theorems and products of partitions

Logic 2024-07-03 v1

Abstract

We both survey and extend a new technique from Lu Liu to prove separation theorems between products of Ramsey-type theorems over computable reducibility. We use this technique to show that Ramsey's theorem for nn-tuples and three colors is not computably reducible to finite products of Ramsey's theorem for nn-tuples and two colors.

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Cite

@article{arxiv.2407.02206,
  title  = {Cross-constraint basis theorems and products of partitions},
  author = {Julien Cervelle and William Gaudelier and Ludovic Levy Patey},
  journal= {arXiv preprint arXiv:2407.02206},
  year   = {2024}
}

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35 pages