This work proposes a new approach to dealing with symmetries in Distributed Constraint Optimisation Problems by adapting the DPOP algorithm [1]. In contrast to an already proposed distributed preprocessing method leading to a problem redefinition [2], we present here a method that exploits the structure of DFS trees, with no explicit redefinition of the problem. We exhibit the flexibility in th...

We discuss the quantization of a system of slowly-moving extreme Reissner-Nordström black holes. In the near-horizon limit, this system has been shown to possess an SL(2, R) conformal symmetry. However, the Hamiltonian appears to have no well-defined ground state. This problem can be circumvented by a redefinition of the Hamiltonian due to de Alfaro, Fubini and Furlan (DFF). We apply the Faddee...

This special issue was inspired by recent developments within community sport which has seen a continual redefinition of the roles and responsibilities sports organisations. Central to...

The purpose of this work is to show that there exists an additional invariance of the βfunction equations of string theory on d + 1-dimensional targets with d toroidal isometries. It corresponds to a shift of the dilaton field and a scaling of the lapse function, and is reminiscent of string field redefinitions. While it preserves the form of the β-function equations, it changes the effective a...

Abstract Purpose This paper proposes a motion planning technique for precise path and trajectory tracking in an underactuated, non-minimum phase, spatial overhead crane. Besides having number of independent actuators that is smaller than the degrees freedom, tip control on this system presents unstable internal dynamics leads to divergent solution inverse dynamic problem. Method The exploits re...