A model in which there are Jech-Kunen trees but there are no Kurepa trees
Abstract
By an omega1 --tree we mean a tree of power omega1 and height omega1. We call an omega1 --tree a Jech--Kunen tree if it has kappa --many branches for some kappa strictly between omega1 and 2omega1. In this paper we construct the models of CH plus 2omega1> omega2, in which there are Jech--Kunen trees and there are no Kurepa trees.
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