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Kerckhoff and Storm conjectured that compact hyperbolic n-orbifolds with totally geodesic boundary are infinitesimally rigid when n>3. This paper verifies this conjecture for a specific example based on the 4-dimensional hyperbolic 120-cell.doi:10.2140/agt.2009.9.537 fatcat:thuozqrbhzcjfkqetp6mnau7au