Abstract
SelaIf $\Gamma_1,\dots,\Gamma_n$ are limit groups and $S\subset\Gamma_1\times\dots\times\Gamma_n$ is of type ${\rm FP}_n(\mathbb Q)$ then $S$ contains a subgroup of finite index that is itself a direct product of at most $n$ limit groups. This answers a question of Sela.
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author = {Bestvina, M. and Feighn, Mark},
title = {Notes on {S}ela's work: {L}imit groups and {M}akanin-{R}azborov diagrams},
note = {to appear in \emph{Geometric and Cohomological Methods in Group Theory} (M. R.~{\sc Bridson},
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