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https://quantum-journal.org/papers/q-2020-12-24-378/ The three types of normal sequential effect algebras – Quantum Abraham Westerbaan, Bas Westerbaan, and John van de Wetering, Quantum 4, 378 (2020). A sequential effect algebra (SEA) is an effect algebra equipped with a... normal sequential effectthree https://ar5iv.labs.arxiv.org/html/2004.12749 [2004.12749] The three types of normal sequential effect algebras A sequential effect algebra (SEA) is an effect algebra equipped with a sequential product operation modeled after the Lüders product on C∗-algebras. A SEA... normal sequential effectthree https://scirate.com/arxiv/2004.12749v2 The three types of normal sequential effect algebras normal sequential effectthree