A previous work dealing with bound states in a Coulomb potential is extended to the case of scattering states. The symmetry of the problem under the Lorentz group 0(1,3) is used to construct wave functions. Harmonic analysis on two-sheeted hyperboloids is briefly discussed in arbitrary dimension. The set of scattering states for both an attractive and a repulsive potential is shown to provide a...

A colony is meant to be a symbol manipulating system consisting of as simple as possible components which behave in a cooperative way such that the collective competence is stricty larger than the component competences. We introduce here colonies whose agents can only perform point mutation (hence the abbreviation PM) transformations of the common string (which represents the environment of the...

background: the appropriate colon cleansing is a major determinant of quality of colonoscopy. the aim of this study was to compare the efficacy and tolerability of the morning (am) peg (polyethylene glycol) solution to previous-evening (pm) peg solution for the afternoon colonoscopy. methods: this comparative study compared the am to pm prep for afternoon outpatient colonoscopy. the subjects ra...