Results 81 to 90 of about 74,505 (227)

Enumerative combinatorics, representations and quasisymmetric functions

open access: yes, 2022
Η παρούσα διατριβή αποτελείται ουσιαστικά από δυο μέρη με κύριο πρωταγωνιστή τις χρωματισμένες quasi-συμμετρικές συναρτήσεις. Το 1984 ο Gessel εισήγαγε τις quasi-συμμετρικές συναρτήσεις, μια γενίκευση των συμμετρικών συναρτήσεων. Έπειτα, το 1993, μαζί με τον Reutenauer μελέτησαν εκτιμήσεις διάφορων quasi-συμμετρικών συναρτήσεων που σχετίζονται με ...
openaire   +2 more sources

Deformation of tropical Hirzebruch surfaces and enumerative geometry [PDF]

open access: yesarXiv, 2013
We illustrate the use of tropical methods by generalizing a formula due to Abramovich and Bertram, extended later by Vakil. Namely, we exhibit relations between enumerative invariants of the Hirzebruch surfaces $\Sigma_n$ and $\Sigma_{n+2}$, obtained by deforming the first surface to the latter.
arxiv  

Combinatorial identities related to eigenfunction decompositions of Hill operators: Open Questions [PDF]

open access: yesarXiv, 2012
We formulate several open questions related to enumerative combinatorics, which arise in the spectral analysis of Hill operators with trigonometric polynomial potentials.
arxiv  

Enumerative and planar combinatorics of trivariate monomial resolutions

open access: yes, 2020
The canonical sylvan resolution is a resolution of an arbitrary monomial ideal over a polynomial ring that is minimal and has an explicit combinatorial formula for the differential. The differential is a weighted sum over lattice paths of weights of chain-link fences, which are sequences of faces that are linked to each other via higher-dimensional ...
openaire   +2 more sources

Schmidt type partitions [PDF]

open access: yesEnumerative Combinatorics and Applications, 2022
Runqiao Li, Ae Ja Yee
doaj   +1 more source

Combinatorics of triangular partitions [PDF]

open access: yesEnumerative Combinatorics and Applications, 2022
François Bergeron, Mikhail Mazin
doaj   +1 more source

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