MODNET

Research Training Network in Model Theory

Publications > Preprint server > Preprint Number 260
Preprint Number 260
260. Krzysztof Krupinski Fields interpretable in superrosy groups with NIP (the non-solvable case) E-mail: Submission date: 4 July 2010. Abstract: (Published in: Journal of Symbolic Logic (75), 372-386, 2010.) Let G be a group definable in a monster model \C of a rosy theory satisfying NIP. Assume that G has hereditarily fsg, and 1<\uth(G)<\infty, where \uth(G) is the thorn U-rank of G. We prove that if G acts definably on a definable set of thorn U-rank 1, then, under some general assumption about this action, there is an infinite field interpretable in \C. We conclude that if G is not solvable-by-finite and it acts faithfully and definably on a definable set of thorn U-rank 1, then there is an infinite field interpretable in \C. As an immediate consequence, we get that if G has a definable subgroup H such that \uth(G)=\uth(H)+1 and G/\bigcap_{g \in G}H^g is not solvable-by-finite, then an infinite field interpretable in \C also exists. Mathematics Subject Classification: 03C45, 03C60 Keywords and phrases: superrosy group, interpretable field, non independence property |

Last updated: July 4 2010 13:57 | Please send your corrections to: |