We prove conjectures on the relative entropy of entanglement (REE) for two families of multipartite qubit states. Thus, analytical expressions of the REE for these families of states can be given. The first family of states is composed of mixtures of some permutation-invariant multiqubit states. The results generalized to multiqudit states are also shown to hold. The second family of states contains Dur's bound entangled states. Along the way, we discuss the relation of the REE to two other measures: robustness of entanglement and the geometric measure of entanglement, slightly extending previous results.
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