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A057565
Number of regions of linearity for Lusztig's piecewise-linear function in type A_n.
0
1, 2, 10, 144, 6608
OFFSET
1,2
COMMENTS
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}).
REFERENCES
J. W. Cockerton, "Canonical bases and piecewise-linear combinatorics", Ph.D., Warwick, 1995
CROSSREFS
Sequence in context: A337072 A294115 A137884 * A152804 A188490 A317075
KEYWORD
hard,nonn,nice
AUTHOR
Richard M. Green, Oct 04 2000
STATUS
approved