2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/90524We construct the protocols to achieve probabilistic and deterministic entanglement transformations for bipartite pure states by means of local operations and classical communication. A new condition on pure contraction transformations is provided.4 pages. To appear on the Proceedings of the Sixth International Conference on Quantum Communication, Measurement and ComputingQuantum Physicstext