
Nondeterministic Time Sucks
This is a record of all of the times software became a drag, sucking up time, resources and energy trying to fix a stupid problem or a silly mistake. These issues have consumed hours of my life, and the solutions to these monkey puzzles were ultimately trivial. I keep this...

Mathematical Cryptography
A presentation on Mathematical Cryptography. To be completed.

Time in Space Mix

Optimization 3  Convex Analysis
Convex Analysis Review Notes Or, everything you ever needed to know fromâ€¦ 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 itâ€™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
Itâ€™s harder than you think. You are tasked with properly counting up to ten. Youâ€™ve done that before, right? Yeah, plenty of times. So go ahead, try it. Count up to ten. No, see, youâ€™ve already messed up. Counting starts at zero. You forgot zero (or at least I am...