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We produce a complete descrption of the lattice of gauge-invariant ideals in C * (Λ) for a finitely aligned k-graph Λ. We provide a condition on Λ under which every ideal is gauge-invariant. We give conditions on Λ under which C * (Λ) satisfies the hypotheses of the Kirchberg-Phillips classification theorem.
General Information SATEN 1 is an object-oriented web-based extraction and belief revision engine. It runs on any computer via a Java 1.1 enabled browser such as Netscape 4. SATEN performs belief revision based on the AGM approach (Alchourrón et al 85). The extraction and belief revision reasoning engines operate on a user specified ranking of information.… (More)
Yeast glutamine synthetase was purified and shown to be an octameric globular protein (s = 15.4,fF0 = 1-29, mol. wt = 390000). It consists of two weakly-bound half molecules (s = 8.7, fFo = 1-35, mol. wt = 180500) and relatively harsh treatment is required to dissociate these octamers into component monomers (s = 3.8). Deactivation of the enzyme in vivo may… (More)
This paper is comprised of two related parts. First we discuss which k-graph algebras have faithful traces. We characterise the existence of a faithful semifinite lower-semicontinuous gauge-invariant trace on C * (Λ) in terms of the existence of a faithful graph trace on Λ. Second, for k-graphs with faithful gauge invariant trace, we construct a smooth (k,… (More)
Work demonstrating the operation of a photorespiratory N cycle in Chlamydomonas is described. NH3 release by this process is light dependent, sensitive to changes in pO2 and pCO2, and abolished by a photosystem II inhibitor. Evidence is presented which shows that this NH3 derives its N from protein rather than from freshly synthesised glutamate. Protein… (More)
We define the relative Cuntz-Krieger algebras associated to finitely aligned higher-rank graphs. We prove versions of the gauge-invariant uniqueness theorem and the Cuntz-Krieger uniqueness theorem for relative Cuntz-Krieger algebras.