from matplotlib.matlab import *
t = arange(0.0, 2.0, 0.01)
s = sin(2*pi*t)
plot(t,s)
title(r'$\alpha_i > \beta_i$', fontsize=20)
text(1, -0.6, r'$\sum_{i=0}^\infty x_i$', fontsize=20)
text(0.6, 0.6, r'$\cal{A}\rm{sin}(2 \omega t)$', 
     fontsize=20)
xlabel('time (s)')
ylabel('volts (mV)')
#savefig('mathtext_tut', dpi=50)
show()