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Iteration of lambda-complete forcing notions not collapsing lambda^+

Andrzej Roslanowski·Saharon Shelah
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Abstract

We look for a parallel to the notion of ``proper forcing'' among lambda-complete forcing notions not collapsing lambda^+ . We suggest such a definition and prove that it is preserved by suitable iterations.

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Andrzej Roslanowski, Saharon Shelah. 2001-07-29. Iteration of lambda-complete forcing notions not collapsing lambda^+. https://arxiv.org/abs/math/9906024

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