Holomorphic Idempotents and Retracts in
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Jerry R. Muir Jr.
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Article
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2000
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Elsevier Science
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English
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Let A be a commutative C U -algebra with identity and open unit ball B. We study holomorphic functions F: B ยช B that are idempotent under composition and establish necessary and sufficient conditions for a set R : B to be the image ลฝ of B under such an idempotent function. In other words, R is a hol