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We compute the potential for localized closed string tachyons in bosonicstring theory on the orbifold C/Z_4 using level-truncated closed string fieldtheory. The critical points of the potential exhibit features which agree withtheir conjectured identification as lower-order orbifolds. However this casealso raises some questions regarding the quantitative predictions associatedwith these conjectures.Comment: 20 pages, 3 figures, v2: The relation between the flat space and  orbifold gravitational constants has been corrected. This resolves the puzzle  of multiple predictions, but worsens the agreement between the depth of the  potential and the change in the deficit angl

On the CSFT approach to localized closed string tachyons