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We discuss a search for CPT violation in neutral charm meson oscillations.The data come from the Fermilab fixed-target experiment FOCUS. While flavormixing in the charm sector is predicted to be small by the standard model, itis still possible to investigate CPT violation through study of the proper timedependence of the asymmetry in right-sign decay rates for D0 and D0-bar. Usingpresent limits for D0-D0-bar mixing we infer bounds on charm CPT violationusing data from FOCUS.Comment: 8 pages, invited talk at the Second Meeting on CPT and Lorentz  Symmetry, Indiana University, Bloomington, August 15-18, 200

CHARM-SYSTEM TESTS OF CPT WITH FOCUS