Zobrazeno 1 - 6
of 6
pro vyhledávání: '"Alexander Wires"'
Autor:
Lingyu Liu, Alexander Wires
Publikováno v:
AIMS Mathematics, Vol 6, Iss 11, Pp 12279-12297 (2021)
In this paper we study a ratio-dependent predator-prey model with a free boundary caused by predator-prey interaction over a one dimensional habitat. We study the long time behaviors of the two species and prove a spreading-vanishing dichotomy; namel
Externí odkaz:
https://doaj.org/article/e15b8f28b789457f81de841976ae75bd
Autor:
Alexander Wires
We investigate the complexity of the partial order relation of Young's lattice. The definable relations are characterized by establishing the maximal definability property modulo the single automorphism given by conjugation; consequently, as an order
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::065f3b12aa738cae83a220d3b1530185
http://arxiv.org/abs/1907.13360
http://arxiv.org/abs/1907.13360
Autor:
Alexander Wires
Publikováno v:
International Journal of Algebra and Computation. 26:1547-1571
We establish a new hereditary characterization of finite idempotent Taylor algebras. This generalizes the algebraic constructions which figured in the recent successful characterization of the correctness of the bounded width algorithm for constraint
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::156df59a2331a4f9493821899c8964d1
https://doi.org/10.1142/s0218196716500685
https://doi.org/10.1142/s0218196716500685
Autor:
Alexander Wires
Publikováno v:
Discrete Mathematics. 338:2523-2538
We characterize those finite tournaments T of mixed-type which admit a Taylor operation; in this case, the corresponding algebras of polymorphisms generate congruence meet-semidistributive varieties. If T c denotes the structure with all unary single
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::70ad876b1e771cab4d13282c7f892efc
https://doi.org/10.1016/j.disc.2015.06.024
https://doi.org/10.1016/j.disc.2015.06.024
Autor:
Alexander Wires
Publikováno v:
Annals of Combinatorics. 20:139-176
For simple graphs, we investigate and seek to characterize the properties first-order definable by the induced subgraph relation. Let \({\mathcal{P}\mathcal{G}}\) denote the set of finite isomorphism types of simple graphs ordered by the induced subg
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1ea9d36150372bfddfc3409add2b1136
https://doi.org/10.1007/s00026-015-0295-4
https://doi.org/10.1007/s00026-015-0295-4
Autor:
Alexander Wires
Publikováno v:
Algebra universalis. 73:335-346
A quasi-Mal’cev condition for quasivarieties is established which in the case of locally finite quasivarieties forbids strongly abelian congruences and for varieties is equivalent to possessing a weak-difference term. We then look at two wellknown
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::29df05baf2e6e15db14d446936d2abc1
https://doi.org/10.1007/s00012-015-0322-7
https://doi.org/10.1007/s00012-015-0322-7