A model in which there are Jech-Kunen trees but there are no Kurepa trees. Jin, R. & Shelah, S. Israel Journal of Mathematics, 84:1–16, 1993. arxiv:math/9308218
bibtex   
@article{JiSh:466,
author = {Jin, Renling and Shelah, Saharon},
fromwhere = {1,IL},
journal = {Israel Journal of Mathematics},
note = { arxiv:math/9308218 },
pages = {1--16},
title = {{A model in which there are Jech-Kunen trees but there are no
 Kurepa trees}},
volume = {84},
year = {1993},
}

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