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Search: id:A057565
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| A057565 |
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Number of regions of linearity for Lusztig's piecewise-linear function in type A_n. |
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+0
1
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OFFSET
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1,2
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COMMENT
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Lusztig's piecewise-linear function is of interest because it appears to be related to a description of the canonical basis of the quantized enveloping algebra U^+(sl_{n+1}).
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REFERENCES
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J.W. Cockerton, "Canonical bases and piecewise-linear combinatorics", Ph.D., Warwick, 1995
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CROSSREFS
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Sequence in context: A059475 A003046 A137884 this_sequence A060595 A086619 A007080
Adjacent sequences: A057562 A057563 A057564 this_sequence A057566 A057567 A057568
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KEYWORD
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hard,nonn,nice
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AUTHOR
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R. M. Green (r.m.green(AT)lancaster.ac.uk), Oct 04 2000
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