3 ms·

His system of equations is not linear so vanilla Ax=b won't work.

• omn123 13y ago
  It is actually linear. a,b,c,d are the unknowns and x1 and x2 are the inputs. A bit confusing since normally x1,x2 denote the unknowns.
  • zmk_ 13y ago
    Not if you are doing econometrics/statistics.
  • tomrod 13y ago
    Unless you like econometrics: then X are data, betas and gammas and sigmas are unknown (oh my!). Jargon is fun, unless I want to communicate across fields :/.
    • omn123 13y ago
      Well today I learned. I never knew that. Stupid mathematics and its inconsistent notation.
      • tomrod 13y ago
        It makes sense when you look at historical development, but there is no reason to learn separate notations now without learning all sides :).
• sanskritabelt 13y ago
  He's solving for abcd, which is linear in powers of x. I'm not going to argue for what's the correct solution, but it's certainly not that mess.