Tolerance update in exercise

Author: fruzsinaagocs

ODES2_spectral.ipynb

@@ -347,7 +347,7 @@
     "which corresponds to a simple harmonic oscillator with constant frequency $\\omega = 100$.\n",
     "\n",
     "* a) First, write a function `f_ivp(t, u)` that encodes this ODE as a system of first-order ODEs and returns the derivative of the vector of unknowns, `u`. It need not have a detailed docstring.\n",
-    "* b) Then define the initial conditions and solution interval. Call `scipy.integrate.solve_ivp` or a similar method (that uses a default Runge--Kutta) to solve the IVP to about 12 digits of accuracy. Think about whether it makes sense to set a relative tolerance, an absolute tolerance, or both. \n",
+    "* b) Then define the initial conditions and solution interval. Call `scipy.integrate.solve_ivp` or a similar method (that uses a default Runge--Kutta) to solve the IVP to about **6** digits of accuracy. Think about whether it makes sense to set a relative tolerance, an absolute tolerance, or both. \n",
     "* c) Time the solution and print the result.\n",
     "\n",
     "Now we'll solve the IVP with a spectral method. \n",