Electronic Journal of Differential Equations, Vol. 2013 (2013), No. 189, pp. 1-14. Title: Backward uniqueness for heat equations with coefficients of bounded variation in time Author: Shigeo Tarama (Osaka City Univ., Osaka, Japan) Abstract: Uniqueness of solutions to the backward Cauchy problem for heat equations with coefficients of bounded variation in time is shown through the Carleman estimate. Submitted February 27, 2013. Published August 28, 2013.} Math Subject Classifications: 35K05, 16D10 Key Words: Heat equation; backward Cauchy problem; uniqueness.