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Revision History for A293153 (Underlined text is an addition; strikethrough text is a deletion.)

Showing entries 1-10 | older changes
A293153 Number of linear extensions of a certain poset C^bar_n.
(history; published version)
#34 by Andrey Zabolotskiy at Wed Aug 21 05:45:56 EDT 2024
STATUS

editing

approved

#33 by Andrey Zabolotskiy at Wed Aug 21 05:45:54 EDT 2024
LINKS

C. Gaetz and Y. Gao, <a href="https://doi.org/10.1016/j.aim.2020.107389"> ">Separable elements in splittings of Weyl groups</a>, Advances in Mathematics, 374 (2020), 107389. See proof of Theorem 6.

STATUS

approved

editing

#32 by N. J. A. Sloane at Tue Aug 20 16:02:08 EDT 2024
STATUS

proposed

approved

#31 by Stefano Spezia at Tue Aug 20 10:08:27 EDT 2024
STATUS

editing

proposed

#30 by Stefano Spezia at Tue Aug 20 10:08:13 EDT 2024
COMMENTS

This is also the number of permutations in the interval [id, (2*n,n,2*n-1,n-1,....,,...,n+1,1)] in the weak Bruhat order of permutations. - Alejandro H. Morales, Aug 20 2024

STATUS

proposed

editing

Discussion
Tue Aug 20 10:08
Stefano Spezia: Three dots are enough
#29 by Michel Marcus at Tue Aug 20 07:44:09 EDT 2024
STATUS

editing

proposed

#28 by Michel Marcus at Tue Aug 20 07:43:57 EDT 2024
LINKS

C. Gaetz and Y. Gao, <a href="https://doi.org/10.1016/j.aim.2020.107389"> Separable elements in splittings of Weyl groups</a>, Advances in Mathematics, 374 (2020), 107389. See proof of Theorem 6.

C. Gaetz, and Y. Gao, <a href="https://doi.org/10.1016/j.aim.2020.107389"> Separable elements in splittings of Weyl groups</a>, Advances in Mathematics, 374 (2020), 107389. See proof of Theorem 6.

Discussion
Tue Aug 20 07:44
Michel Marcus: G before M
#27 by Michel Marcus at Tue Aug 20 07:43:17 EDT 2024
COMMENTS

This is also the number of permutations in the interval [id, (2*n,n,2*n-1,n-1,....,n+1,1)] in the weak Bruhat order of permutations.. - _Alejandro H. Morales_, Aug 20 2024

LINKS

A. Alejandro H. Morales, I. Pak, and G. Panova, <a href="https://www.math.ucla.edu/~pak/papers/EulerFib4-journal.pdf">Why is pi < 2 phi?</a>, Preprint, 2016; <a href="https://doi.org/10.1080/00029890.2018.1496757">Why Is Pi Less Than Twice Phi?</a>, The American Mathematical Monthly, 125 (2018), 715-723. See Exercise 12 and Open Problem 16. Beware of the erroneous a(5).

EXTENSIONS

Another interpretation and link added by Alejandro H. Morales, Aug 20 2024

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proposed

editing

#26 by Alejandro H. Morales at Tue Aug 20 07:31:00 EDT 2024
STATUS

editing

proposed

#25 by Alejandro H. Morales at Tue Aug 20 07:30:50 EDT 2024
COMMENTS

This is also the number of permutations in the interval [id, (2*n,n,2*n-1,n-1,....,n+1,1)] in the weak Bruhat order of permutations.

LINKS

Alejandro A. H. Morales, I. Pak, and G. Panova, <a href="https://www.math.ucla.edu/~pak/papers/EulerFib4-journal.pdf">Why is pi < 2 phi?</a>, Preprint, 2016; <a href="https://doi.org/10.1080/00029890.2018.1496757">Why Is Pi Less Than Twice Phi?</a>, The American Mathematical Monthly, 125 (2018), 715-723. See Exercise 12 and Open Problem 16. Beware of the erroneous a(5).

C. Gaetz, and Y. Gao, <a href="https://doi.org/10.1016/j.aim.2020.107389"> Separable elements in splittings of Weyl groups</a>, Advances in Mathematics, 374 (2020), 107389. See proof of Theorem 6.

EXTENSIONS

Another interpretation and link added by Alejandro H. Morales, Aug 20 2024

STATUS

approved

editing

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Last modified August 29 15:03 EDT 2024. Contains 375517 sequences. (Running on oeis4.)