A matrix characterization of the maximal groups in $\beta _X$

Displaying similar documents to “A matrix characterization of the maximal groups in $β_{X}$ ”

Štefan Schwarz (1965)

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Štefan Schwarz (1970)

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Roman Drnovšek (1997)

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We construct a semigroup of bounded idempotents with no nontrivial invariant closed subspace. This answers a question which was open for some time.