In: Mathematical Programming, 2015, vol. 149, no. 1-2, p. 361-390
|
In: Nature Physics, 2020, p. -
Nd2Ir2O7 is a correlated semimetal with the pyrochlore structure, in which competing spin–orbit coupling and electron–electron interactions are believed to induce a time- reversal symmetry-broken Weyl semimetal phase characterized by pairs of topologically protected Dirac points at the Fermi energy1,2,3,4. However, the emergent properties in these materials are far from clear, and exotic...
|
In: Mathematical Programming, 2014, vol. 146, no. 1-2, p. 525-554
|
In: Discrete Mathematics, 2009, vol. 309, no. 12, p. 4027-4036
We are interested in coloring the edges of a mixed graph, i.e., a graph containing unoriented and oriented edges. This problem is related to a communication problem in job-shop scheduling systems. In this paper we give general bounds on the number of required colors and analyze the complexity status of this problem. In particular, we provide NP-completeness results for the case of outerplanar...
|
In: Advances in Geometry, 2019, vol. 19, no. 1, p. 89–100
It is known that there exist hyperplane arrangements with the same underlying matroid that admit non-homotopy equivalent complement manifolds. Here we show that, in any rank, complex central hyperplane arrangements with up to 7 hyperplanes and the same underlying matroid are isotopic. In particular, the diffeomorphism type of the complement manifold and the Milnor fiber and fibration of these...
|
In: Discrete & Computational Geometry, 2009, vol. 42, no. 2, p. 187-205
|
In: Mathematische Annalen, 2012, vol. 354, no. 4, p. 1201-1221
|
In: Brain Topography, 2009, vol. 22, no. 3, p. 158-165
|
In: Combinatorica, 2009, vol. 29, no. 6, p. 691-698
|
In: Mathematical Programming, 1997, vol. 79, no. 1-3, p. 369-395
|