On order automorphisms of the effect algebra
classification
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keywords
automorphismsorderalgebraeffectproofscharacterizationcomplicatedcone
read the original abstract
We give short proofs of two \v{S}emrl's descriptions of order automorphisms of the effect algebra. This sheds new light on both formulas that look quite complicated. Our proofs rely on Moln\'{a}r's characterization of order automorphisms of the cone of all positive operators.
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