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PreprintCC BY 4.0arXiv

Indiscernible Extraction in Theories with Bounded k-splitting

  • Connor Watson
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Abstract

Hanson introduced the class of theories with bounded k-splitting, a higher-arity notion of stability, and proved an indiscernible extraction result for those theories assuming the existence of a k-ineffable cardinal. In this article, we show that the conclusion of Hanson's theorem is equivalent to the weaker assertion that there exists a weakly compact cardinal, as well as prove additional indiscernible extraction results for these theories in ZFC. Finally, we show that Hanson's construction of total bounded ultraimaginary Morley sequences in theories with bounded k-splitting follows from ZFC.

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Cite

BibTeXRIS
BibTeX
@misc{watson2026indiscernible,
  title = {{Indiscernible Extraction in Theories with Bounded $k$-splitting}},
  author = {Connor Watson},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.22002},
  eprint = {2610.22002},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.22002},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Indiscernible Extraction in Theories with Bounded k-splitting
AU  - Connor Watson
PY  - 2026
DA  - 2026/10/16
PB  - arXiv
DO  - 10.48550/arxiv.2610.22002
UR  - https://arxiv.org/abs/2610.22002
AB  - Hanson introduced the class of theories with bounded k-splitting, a higher-arity notion of stability, and proved an indiscernible extraction result for those theories assuming the existence of a k-ineffable cardinal. In this article, we show that the conclusion of Hanson's theorem is equivalent to the weaker assertion that there exists a weakly compact cardinal, as well as prove additional indiscernible extraction results for these theories in ZFC. Finally, we show that Hanson's construction of total bounded ultraimaginary Morley sequences in theories with bounded k-splitting follows from ZFC.
ER  -