g = graphs.RandomGNM(40, 50) # 15 vertices and 20 edges show(g) g.incidence_matrix()
%time n= factorial(10^7)
%time m=n*n
%var x y z g = golden_ratio; r = 4.77 p = 2 - (cos(x + g*y) + cos(x - g*y) + cos(y + g*z) + cos(y - g*z) + cos(z - g*x) + cos(z + g*x)) show(implicit_plot3d(p, (x, -r, r), (y, -r, r), (z, -r, r), plot_points=30, color='orange', mesh=1, opacity=.7), spin=1)
plot(sin)
2/3
sphere()
2+3