• Time in Space Mix

  • Optimization 3 - Convex Analysis

    Convex Analysis Review Notes Or, everything you ever needed to know from… Convex analysis? Convex Sets Let . The set is called Convex if for any and , it holds that A set is convex if, from everywhere in S, all other points are visible. If two points in are...

  • Optimization 2 - Homework 2

    Homework Problems #2 Let be an arbitrary matrix, and let be it’s symmetric counterpart. Show for all if and only if is positive definite. WTS is positive definite Suppose is positive definite Then for all (defn of positive definite) Then (rewrite ) Because , eigenvalues of are positive (property of...

  • Optimization 1 - Linear Algebra Review

    Linear Algebra Review Notes Or, everything you ever needed to know from linear algebra. Vectors Elements in are Vectors. A vector can be thought of as real numbers stacked on top of each other (column vectors). Properties of Vectors Let be vectors in , and a scalar in . Let...

  • The Bad Mathematics of Psychometrics

    Are you Driving, Amiable, Analytical or Expressive? I do not like psychometrics. At best they are fun surveys you can take in between clicking through buzzfeed articles. At worst, they are kafkaesque personality tests based off of shaky pseudoscience. I learned some job recruiters ask candidates to take these surveys...

  • How to Count up to Ten

    It’s harder than you think. You are tasked with properly counting up to ten. You’ve done that before, right? Yeah, plenty of times. So go ahead, try it. Count up to ten. No, see, you’ve already messed up. Counting starts at zero. You forgot zero (or at least I am...