Geodesic
Exposed points in the set of representing measures for the disc algebra
Annales Polonici Mathematici, Tome 61 (1995) no. 1, pp. 59-62 Cet article a éte moissonné depuis la source Institute of Mathematics Polish Academy of Sciences

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It is shown that for each nonzero point x in the open unit disc D, there is a measure whose support is exactly ∂D ∪ {x} and that is also a weak*-exposed point in the set of representing measures for the origin on the disc algebra. This yields a negative answer to a question raised by John Ryff.
DOI : 10.4064/ap-61-1-59-62
Keywords: disc algebra, exposed point, representing measure

Alexander Izzo 1

1 
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Alexander Izzo. Exposed points in the set of representing measures for the disc algebra. Annales Polonici Mathematici, Tome 61 (1995) no. 1, pp. 59-62. doi: 10.4064/ap-61-1-59-62

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