2009 seminar talk: Cardinal characteristics and projective wellorders

Talk held by Vera Fischer (KGRC) at the KGRC seminar on 2009-10-29.


Using countable support iteration of S-proper posets, we show that the existence of a Δ13 definable wellorder of the reals is consistent with each of the following: d < c, b < a = s, b < g. This is a joint work with Sy Friedman.

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Kurt Gödel Research Center for Mathematical Logic. Währinger Straße 25, 1090 Wien, Austria. Phone +43-1-4277-50501. Last updated: 2010-12-16, 04:37.