Jacobian Conjecture for Baby

(muchmirul.github.io)

73 points | by porphyra 4 days ago

5 comments

  • johnfn 26 minutes ago
    This is really good - miles ahead of almost all other math writing I have read. One particular thing I really liked was the explanation of the determinant. When I was in college I spent a very long time trying to get some intuitive explanation for a determinant of a matrix and the best I could get is that you just multiplied and subtracted some numbers and poof there you go. I KNEW there had to be some more comprehensible explanation and it drove me crazy that people just parroted textbooks without any real understanding.

    This reminds me of that silly video everyone was shown in middle school about inverting a sphere :-)

    I am very curious how it was written (will there be a write up to the write up?!). It feels likely AI assisted, but this seems to me to be the best possible use of AI -- crunching out a bunch of visualizations of complex ideas so that they are easy to understand just by looking. The writing also feels a little AI written but definitely feels very human-assisted.

  • neuralkoi 3 days ago
    This was an excellent write-up and taught me more in 20 minutes than my linear algebra teacher did in 6 months.

    The material however, got fairly dense. After chapter 10, it is no longer "baby" material in my opinion.

  • y-curious 31 minutes ago
    I followed very loosely and still got it. Very cool, the kind of math that gets close to feeling like "real life". I was really hoping that your mentions of "solving it by hand" and "you can prove it to yourself by hand" at the end were going to come to some clever maneuver I could do with my own hand (like the physics magnetism hand rule). Still, awesome.
  • para_parolu 14 minutes ago
    Awesome. I was literally asking ai to find blog post like this but couldn’t get anything decent
  • NooneAtAll3 45 minutes ago
    beginning reeked of... maybe not ai, but bad writing

    but the further into the text, the better the prose

    by the end it was great

    ---

    good to know that conjecture has been false for real numbers for a while now

    • samlinnfer 32 minutes ago
      It got more and more AI towards the end.
      • CamperBob2 29 minutes ago
        Also more and more use of an extremely annoying effect: text-heavy animations that reset themselves for no reason while you're trying to read them. Step 11, for instance: no value whatsoever is added by erasing and redrawing that figure.

        Still, overall a very nice piece of pedagogy. If you didn't grok determinants before, this will probably help.