SOUSLIN TREES WHICH ARE HARD TO SPECIALISEJAMES CUMMINGSAbstract

@inproceedings{Cummings2007SOUSLINTW,
  title={SOUSLIN TREES WHICH ARE HARD TO SPECIALISEJAMES CUMMINGSAbstract},
  author={James Cummings},
  year={2007}
}
We construct some +-Souslin trees which cannot be specialised by any forcing which preserves cardinals and coonalities. For a regular cardinal we use the principle, for singular we use squares and diamonds. 

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