[chang_ramsey] ValueError problem is infeasible

[najuzilu]

I am executing lectures using environment.yml. The following warning occurs:

<ipython-input-4-04bea48ab06f>:207: OptimizeWarning: Solving system with option 'cholesky':True failed. It is normal for this to happen occasionally, especially as the solution is approached. However, if you see this frequently, consider setting option 'cholesky' to False.
  res = linprog(c, A_ub=aineq_C_mbar, b_ub=bineq_C_mbar,
<ipython-input-4-04bea48ab06f>:207: OptimizeWarning: Solving system with option 'sym_pos':True failed. It is normal for this to happen occasionally, especially as the solution is approached. However, if you see this frequently, consider setting option 'sym_pos' to False.
  res = linprog(c, A_ub=aineq_C_mbar, b_ub=bineq_C_mbar,
/Users/junaluzi/opt/anaconda3/envs/qe-lectures/lib/python3.8/site-packages/scipy/optimize/_linprog_ip.py:110: LinAlgWarning: Ill-conditioned matrix (rcond=1.05268e-17): result may not be accurate.
  return sp.linalg.solve(M, r, sym_pos=sym_pos)

Then, this error occurs:

ValueError: The algorithm terminated successfully and determined that the problem is infeasible.

[jstac]

Yes, I see the lecture is failing on the live site too: https://python-advanced.quantecon.org/chang_ramsey.html. Thanks @najuzilu.

[mmcky]

@najuzilu this may be related to #79 -- could you look into this?

[najuzilu]

Thanks @mmcky. I'll close this issue then and add a full screenshot of the output under #79.