A bstract We study the perturbative expansion of ground state energy in presence an external field coupled to a conserved charge integrable two-dimensional O(4) nonlinear sigma model. By solving Volin’s algebraic equations for coefficients we large order asymptotic behaviour series analytically. confirm previously numerically found leading and nearest singularities Borel transformed associated ...

There is estimated to be over a million new cases of paediatric tuberculosis (TB) globally every year. Children usually acquire TB infection from smear positive adult family contacts, a high proportion going on to develop disease. Childhood disease reflects recent infection, and therefore paediatric TB represents continuing transmission in the population. In England and Wales, TB notifications ...

of Hebb's theory. Testing this theory would require one and Asif A. Ghazanfar to record from populations of neurons distributed across Department of Neurobiology multiple cortical areas and subcortical nuclei. Using a Duke University Medical Center chronic multiple-electrode recording preparation, Nico-Durham, North Carolina 27710 lelis and coworkers (1995, 1997a) recorded from populations of n...