Electronic Journal of Differential Equations, Vol. 2013 (2013), No. 232, pp. 1-29. Title: Motion of compressible magnetic fluids in T^3 Author: Weiping Yan (Jilin Univ., Changchun, China) Abstract: This article shows the existence of weak time-periodic motion of a three-dimensional system of compressible magnetic fluid driven by time-dependent external forces in a torus T^3. The model consists of the mass conservation equation, the linear momentum equation, the angular momentum equation, the Bloch-Torrey type equation and the magnetostatic equation. This analysis is based on the Faedo-Galerkin method and weak compactness techniques. Submitted August 8, 2013. Published October 18, 2013. Math Subject Classifications: 76W05, 36D30, 35B10. Key Words: Magnetohydrodynamics; weak solution; periodic solution.