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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
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OFFSET
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1,2
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COMMENTS
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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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LINKS
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CROSSREFS
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KEYWORD
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hard,nonn,nice
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AUTHOR
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STATUS
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approved
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