Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Olteanu, Anda"'
Autor:
Olteanu, Anda
We consider the line graph of a simplicial complex. We prove that, as in the case of line graphs of simple graphs, one can compute the second graded Betti number of the facet ideal of a pure simplicial complex in terms of the combinatorial structure
Externí odkaz:
http://arxiv.org/abs/2206.13463
Autor:
Olteanu, Anda
We describe all the trees with the property that the corresponding edge ideal of their line graph has a linear resolution. As a consequence, we give a complete characterization of those trees $T$ for which the line graph $L(T)$ is co-chordal. We also
Externí odkaz:
http://arxiv.org/abs/2108.03127
Autor:
Olteanu, Anda
We describe all the trees with the property that the corresponding edge ideal of the square of the tree has a linear resolution. As a consequence, we give a complete characterization of those trees $T$ for which the square is co-chordal, that is the
Externí odkaz:
http://arxiv.org/abs/2003.10187
Autor:
Huybrechs, Daan, Olteanu, Anda-Elena
The Wave Based Method (WBM) is a Trefftz method for the simulation of wave problems in vibroacoustics. Like other Trefftz methods, it employs a non-standard discretisation basis consisting of solutions of the partial differential equation (PDE) at ha
Externí odkaz:
http://arxiv.org/abs/1802.01090
Autor:
Olteanu, Anda, Welker, Volkmar
We define the Buchberger resolution, which is a graded free resolution of a monomial ideal in a polynomial ring. Its construction uses a generalization of the Buchberger graph and encodes much of the combinatorics of the Buchberger algorithm. The Buc
Externí odkaz:
http://arxiv.org/abs/1409.2041
Autor:
Kubitzke, Martina, Olteanu, Anda
We consider path ideals associated to special classes of posets such as tree posets and cycles. We express their property of being sequentially Cohen-Macaulay in terms of the underlying poset. Moreover, monomial ideals, which arise from the Luce-deco
Externí odkaz:
http://arxiv.org/abs/1303.4234
Autor:
Huybrechs, Daan, Olteanu, Anda-Elena
Publikováno v:
In Wave Motion April 2019 87:92-105
Autor:
Olteanu, Anda
We consider powers of lexsegment ideals with a linear resolution (equivalently, with linear quotients) which are not completely lexsegment ideals. We give a complete description of their minimal graded free resolution.
Externí odkaz:
http://arxiv.org/abs/1206.6731
Autor:
Micale, Vincenzo, Olteanu, Anda
For any numerical semigroup $S$, there are infinitely many numerical symmetric semigroups $T$ such that $S=\frac{T}{2}$ is their half. We are studying the Betti numbers of the numerical semigroup ring $K[T]$ when $S$ is a 3-generated numerical semigr
Externí odkaz:
http://arxiv.org/abs/1111.1433
Autor:
Olteanu, Anda
B. Sturmfels and S. Sullivant associated to any graph a toric ideal, called the cut ideal. We consider monomial cut ideals and we show that their algebraic properties such as the minimal primary decomposition, the property of having a linear resoluti
Externí odkaz:
http://arxiv.org/abs/1105.3564