{\rtf1\ansi\deff0\deftab360 {\fonttbl {\f0\fswiss\fcharset0 Arial} {\f1\froman\fcharset0 Times New Roman} {\f2\fswiss\fcharset0 Verdana} {\f3\froman\fcharset2 Symbol} } {\colortbl; \red0\green0\blue0; } {\info {\author Biblio 7.x}{\operator }{\title Biblio RTF Export}} \f1\fs24 \paperw11907\paperh16839 \pgncont\pgndec\pgnstarts1\pgnrestart J. Chen, Ji, Z., Kribs, D., Wei, Z., and Zeng, B., ?Ground-State Spaces of Frustration-Free Hamiltonians?, Journal of Mathematical Physics, vol. 53, no. 10, p. 102201, 2012.\par \par }