The Multilateral Instrument: Avoidance of Permanent Establishment Status and the Reservations on behalf of Australia and the UK

This paper considers fully probabilistic system models. Each transition is quantified with a probability—its likelihood of occurrence. Properties are expressed as automata that either accept or reject system runs. The central question is to determine the fraction of accepted system runs. We also consider probabilistic timed system models. Their properties are timed automata that accept timed runs iff all timing constraints resent in the automaton are met; otherwise it rejects. The central question is to determine the fraction of accepted timed system runs

PSP Performance Analysis Report

The Personal Software Process (PSP) is a structured software development process that is intended to help software engineers understand and improve their performance, by using a disciplined, data-driven procedure. The PSP was created by Watts Humphrey to apply the underlying principles of the Software Engineering Institute’s (SEI) Capability Maturity Model (CMM) to the software development practices of a single developer. It gives software engineers the process skills necessary to work on a Team Software Process (TSP) team. PSP training includes eight assignments in two courses – PSP Fundamentals and PSP Advanced. The report includes final analysis of all the data that was gathered during the training

Set-theoretic solutions of the Yang-Baxter equation, Braces, and Symmetric groups

We involve simultaneously the theory of matched pairs of groups and the theory of braces to study set-theoretic solutions of the Yang-Baxter equation (YBE). We show the intimate relation between the notions of a symmetric group (a braided involutive group) and a left brace, and find new results on symmetric groups of finite multipermutation level and the corresponding braces. We introduce a new invariant of a symmetric group $(G,r)$, \emph{the derived chain of ideals of} $G$, which gives a precise information about the recursive process of retraction of $G$. We prove that every symmetric group $(G,r)$ of finite multipermutation level $m$ is a solvable group of solvable length at most $m$. To each set-theoretic solution $(X,r)$ of YBE we associate two invariant sequences of symmetric groups: (i) the sequence of its derived symmetric groups; (ii) the sequence of its derived permutation groups and explore these for explicit descriptions of the recursive process of retraction. We find new criteria necessary and sufficient to claim that $(X, r)$ is a multipermutation solution.Comment: 44 page