basic.c */
/**//* Project:NeuroBasic, basic package*//**/
/* Survey:This is a simple Basic b-code compiler which*/
/*can be used as a comfortable command Shell for */
/* any program. The actual compiler is found in */
/*compiler.c.*/
/*The functions m_fctptr() and user_server()*/
/*build an interface to an
A cylindrical wave expansion method is developed to obtain the scattering field for an ideal
two-dimensional cylindrical invisibility cloak. A near-ideal model of the invisibility cloak is set up
to solve the boundary problem at the inner boundary of the cloak Shell. We confirm that a cloak
with the ideal material parameters is a perfect invisibility cloak by systematically studying the
change of the scattering coefficients from the near-ideal case to the ideal one. However, due to the
slow convergence of the zeroth order scattering coefficients, a tiny perturbation on the cloak would
induce a noticeable field scattering and penetration.
