A note on similarity relations
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Volker Strehl
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Article
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1977
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Elsevier Science
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English
โ 287 KB
A simple proof is given for the fact that the number of nonsingular similarity relations on (1,2,... n), for which the transitive closure consists of k blocks, equals ("\*;'\_i-') -(2"-fh -'), 1, =G k s n/2. In particular, this implies a recent result of Shapiro about Catalan numbers and Fine's Jequ