The Similarity Problem for Z-stable C*-algebras

We show that the tensor product of two unital C*-algebras, one of which is nuclear and admits a unital *-homomorphism from (the building blocks of) the Jiang-Su algebra, has Kadison's similarity property. As a consequence, we obtain that a unital C*-algebra which absorbs the Jiang-Su algebra tensorially also has this property.Comment: 6 page

Improving QCD with fermions: the 2 dimensional case of QCD with Sea Quarks

We study QCD in 2 dimensions using the improved lattice fermionic Hamiltonian proposed by Luo, Chen, Xu and Jiang. The vector mass and the chiral condensate are computed for various $SU(N_C)$ gauge groups. We do observe considerable improvement in comparison with the Wilson quark case.Comment: LATTICE98(improvement

On the heterochromatic number of hypergraphs associated to geometric graphs and to matroids

The heterochromatic number hc(H) of a non-empty hypergraph H is the smallest integer k such that for every colouring of the vertices of H with exactly k colours, there is a hyperedge of H all of whose vertices have different colours. We denote by nu(H) the number of vertices of H and by tau(H) the size of the smallest set containing at least two vertices of each hyperedge of H. For a complete geometric graph G with n > 2 vertices let H = H(G) be the hypergraph whose vertices are the edges of G and whose hyperedges are the edge sets of plane spanning trees of G. We prove that if G has at most one interior vertex, then hc(H) = nu(H) - tau(H) + 2. We also show that hc(H) = nu(H) - tau(H) + 2 whenever H is a hypergraph with vertex set and hyperedge set given by the ground set and the bases of a matroid, respectively

Jiang Zemin's discourse on intellectuals: the political use of formalised language and the conundrum of stability

This article focuses on the specific forms of power that are embodied in the properties and functions of formalised language, as it was used by Jiang Zemin in crucial political documents on the Party’s policy towards intellectuals. This inquiry illuminates various possibilities for the normalisation and inculcation of formalised language in the understudied decade of the 1990s, when the mantra “without stability, nothing can be achieved” became a tautology. The internal constitution of the selected texts is examined with an eye to the dialogic interaction with the production and reception of Mao Zedong and Deng Xiaoping’s political discourses on intellectuals (Mao 1942; Deng 1978). The analysis of language practices and discursive formations in a comparative per-spective sheds light on the respective socio-political and historical contexts. It also reveals the extreme involution-devolution of formalised language in the Jiang Zemin era, when “preserving stability” was reaffirmed as a crucial concern of the Party leadership with the ultimate aim of preserving its monopoly of power