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A098001 Categorical sequence for the Lie group Sp(k) for any k > 2. 0
0, 3, 7, 10, 18 (list; graph; refs; listen; history; internal format)
OFFSET

0,2

COMMENTS

The categorical sequence for a CW complex X is the sequence whose n-th term is the smallest m for which the Lusternik-Schnirelmann category of the m-skeleton is equal to n (or else infinity if there is no such m).

All categorical sequences begin with a_0 = 0. It can be shown that for all categorical sequences, a_{k+l} >= a_k + a_l.

REFERENCES

Cornea, Octav; Lupton, Gregory; Oprea, John; Tanre, Daniel. Lusternik-Schnirelmann category. Mathematical Surveys and Monographs, 103. American Mathematical Society, Providence, RI, 2003.

R. Nendorf, N. Scoville, J. Strom, Categorical Sequences, preprint, 2004.

FORMULA

No known formula.

CROSSREFS

Sequence in context: A041251 A042435 A042591 * A171071 A024330 A069153

Adjacent sequences:  A097998 A097999 A098000 * A098002 A098003 A098004

KEYWORD

hard,nonn

AUTHOR

Jeff Strom (Jeff.Strom(AT)wmich.edu), Sep 08 2004

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Last modified February 14 22:37 EST 2012. Contains 205679 sequences.