Fig. 5

Contour plots of the absolute values of the coefficient functions \(D^{(1,1)}_{xx}(\boldsymbol {r})\) (a), \(D^{(1,1)}_{xy}(\boldsymbol {r})=D^{(1,1)}_{yx}(\boldsymbol {r})\) (b), and \(D^{(1,1)}_{yy}(\boldsymbol {r})\) (c) in a homogeneous distribution of loops with radius R=1. Contours are labeled by function value. Note that as opposed to the other plots in this section, these plots are restricted to distances r<1 from the origin