DX: reduce resolution of Riemann sheet plot

Author: redeboer

docs/usage/dynamics/riemann-sheets.ipynb

@@ -476,8 +476,8 @@
    },
    "outputs": [],
    "source": [
-    "x = np.linspace(0, 6, num=300)\n",
-    "y = np.linspace(1e-3, 1, num=100)\n",
+    "x = np.linspace(0, 6, num=150)\n",
+    "y = np.linspace(1e-3, 1, num=40)\n",
     "X, Y = np.meshgrid(x, y)\n",
     "Zn = X - Y * 1j\n",
     "Zp = X + Y * 1j"