from mpl_toolkits.mplot3d import Axes3D
from matplotlib import cm
from matplotlib.colors import LogNorm
import matplotlib.pyplot as plt
import numpy as np

fig = plt.figure()
ax = Axes3D(fig, azim = -29, elev = 49)
X = np.arange(-6, 6, 0.1)
Y = np.arange(-6, 6, 0.1)
X, Y = np.meshgrid(X, Y)
Z = (X*X+Y-11)**2 + (X+Y*Y-7)**2
ax.plot_surface(X, Y, Z, rstride = 1, cstride = 1, norm = LogNorm(), cmap = cm.jet)

plt.xlabel("x")
plt.ylabel("y")

plt.savefig("Himmelblau function.svg")

plt.show()