def mean_cooperation(self):
expr = self.__get_replicator_rhs()
if expr == 0:
return 0.0
p = Poly(expr, domain='RR')
roots = sorted([float(r) for r in p.nroots(n=15, maxsteps=300) if r.is_real and r >= 0.00 and r <= 1.00])
roots = [0.0] + roots + [1.0]
coop = 0
p = Poly(x * (1 - x) * expr, domain='RR')
for i in range(1, len(roots)):
difference = roots[i] - roots[i - 1]
poly_val = p.subs(x, roots[i - i] + difference / 2)
coop += roots[i - 1] * difference if poly_val < 0 else roots[i] * difference
return coop
