Sh:1216

• Golshani, M., & Shelah, S. (2023). Usuba’s principle UB_\lambda can fail at singular cardinals. J. Symbolic Logic. arXiv: 2107.09339 DOI: 10.1017/jsl.2023.61
• Abstract:
  We answer a question of Usuba by showing that the combinatorial principle UB_\lambda can fail at a singular cardinal. Furthermore, \lambda can be taken to be \aleph_\omega.
• Version 2023-09-07 (9p) published version (9p)

@article{Sh:1216,
 author = {Golshani, Mohammad and Shelah, Saharon},
 title = {{Usuba's principle $UB_\lambda$ can fail at singular cardinals}},
 journal = {J. Symbolic Logic},
 year = {2023},
 doi = {10.1017/jsl.2023.61},
 note = {\href{https://arxiv.org/abs/2107.09339}{arXiv: 2107.09339}},
 arxiv_number = {2107.09339}
}