% Schematic1.m %
clear all; figure(1); clf; hold on; n = 300; 
th = linspace(0,2*pi,n); r=2.5; 
p=patch(r*cos(th),r*sin(th), [0.7 0.7 0.7]); hold on
r=1.5; p=patch(r*cos(th),r*sin(th), [1 1 1]);
r = 2; plot(r*cos(th),r*sin(th),'k-','linewidth',2);
r = 2.5; plot(r*cos(th),r*sin(th),'k--','linewidth',2);
r = 1.5; plot(r*cos(th),r*sin(th),'k--','linewidth',2);
fs = 20;
text('Interpreter','latex','String','$$\Omega_\delta$$',...
    'Position',[-1.8 1.111],'FontSize',fs)
text('Interpreter','latex','String','$$2\delta$$', ...
    'Position',[1.3 1.13],'FontSize',fs)
text('Interpreter','latex','String','$$S$$', ...
    'Position',[3.0 0],'FontSize',fs)
text('Interpreter','latex','String','$$\partial\Omega_\delta$$',...
    'Position',[-3.4 -1.3],'FontSize',fs);
annotation('doublearrow',[0.582 0.62],[0.62 0.6931]);
annotation('arrow',[0.72 0.66],[0.52 0.52]);
annotation('arrow',[0.326 0.4165],[0.4212 0.4656]);
annotation('arrow',[0.3291 0.35],[0.4212 0.4586]);
axis image; a = 4.5; axis([-a a -a a]); axis off;
