Zobrazeno 1 - 4
of 4
pro vyhledávání: '"Jonah Ostroff"'
Publikováno v:
Math Horizons. 27:12-15
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75d3d9b1497239492c872eae65cbe1b0
https://doi.org/10.1080/10724117.2020.1714377
https://doi.org/10.1080/10724117.2020.1714377
Autor:
David Lonoff, Jonah Ostroff
Publikováno v:
Annals of Combinatorics. 14:143-158
Symmetric pattern-avoiding permutations are restricted permutations which are invariant under actions of certain subgroups of D4, the symmetry group of a square. We examine pattern-avoiding permutations with 180° rotational-symmetry. In particular,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::de2f21c70b37d07101a254ab960c36f6
https://doi.org/10.1007/s00026-010-0050-9
https://doi.org/10.1007/s00026-010-0050-9
Exceptional sequences are certain ordered sequences of quiver representations. We introduce a class of objects called strand diagrams and use this model to classify exceptional sequences of representations of a quiver whose underlying graph is a type
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::642d286934d6aecb05e3a9300987430e
http://arxiv.org/abs/1506.08927
http://arxiv.org/abs/1506.08927
Autor:
Kiyoshi Igusa, Jonah Ostroff
We develop basic cluster theory from an elementary point of view using a variation of binary trees which we call mixed cobinary trees. We show that the number of isomorphism classes of such trees is given by the Catalan number Cn where n is the numbe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7b8e2117c204e71c8ed23080dddb29b5
http://arxiv.org/abs/1307.3587
http://arxiv.org/abs/1307.3587