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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 (list; graph; refs; listen; history; text; internal format)
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

LINKS

Table of n, a(n) for n=1..5.

CROSSREFS

Sequence in context: A003046 A294115 A137884 * A152804 A188490 A295207

Adjacent sequences:  A057562 A057563 A057564 * A057566 A057567 A057568

KEYWORD

hard,nonn,nice

AUTHOR

Richard M. Green, Oct 04 2000

STATUS

approved

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Last modified February 24 05:48 EST 2018. Contains 299597 sequences. (Running on oeis4.)