2018/03/02 by Roman Drnovšek, Drnovšek, Roman
Mathematics · #FOS: Mathematics #Functional Analysis (math.FA) #math.FA
paper · pdf · doi:10.48550/arxiv.1803.00762
7 pages
arxiv created 2018/03/02 · arxiv updated 2018/03/05
We give short proofs of two Šemrl's descriptions of order automorphisms of the effect algebra. This sheds new light on both formulas that look quite complicated. Our proofs rely on Molnár's characterization of order automorphisms of the cone of all positive operators.