On the number of simple arrangements of five double pseudolines

A special case of the representation problem for weakly dicomplemented lattices, posed in [4] is whether complete weakly dicomplemented lat- tices are isomorphic to concept

Abstract We study representation stability in the sense of Church and Farb of sequences of cohomology groups of complements of arrangements of linear subspaces in real and complex

Nous pouvons donc retrouver, pour les étudiants, un besoin d’un espace où l’on peut discuter librement, éventuellement anonymement et où plusieurs rôles peuvent être mis en

l’instruction publique la sous-commission pour l’étude de la coor dination de l’enseignement à ses divers degrés, que se sont prépa rés des travaux sérieux présentés par

For solvable groups Arvind and Tor´an [1] have shown that the group isomorphism problem is in N P ∩ coNP under certain complexity assumptions but, to our knowledge, the

We study the isomorphism types of simply connected complexes with Moebius–Kantor links using a local invariant called the parity.. We show that the parity can be computed explicitly

As two faces of G which belong to two different connected components cannot be matched by f with faces which are 2-sewn in G 00 , we ensure that when a 4-edge face of a clause

However, concerning measurement, equation (27) shows that at a given physical-time-instant