• Computational Graph Theory

    A humerous presentation on Graph Theory, covering Linked Lists, Binary Search Trees, DAGs, and other relevant data structures and algorithms.

  • 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 the past, present and future of Mathematical Cryptography

  • Time in Space Mix

  • Optimization - Convex Analysis Review

    Convex Analysis Review Notes Or, everything you ever needed to know from… Convex analysis? Convex Sets Let \(S \subseteq \mathbb{R}^n\). The set \(S\) is called Convex if for any \(x_1, x_2 \in S\) and \(\lambda \in (0,1)\), it holds that \[\lambda x_1 + (1 - \lambda) x_2 \in S\] A...

  • Optimization - Homework 2

    Homework Problems #2 Let \(A \in \mathbb{R}^{n \times n}\) be an arbitrary matrix, and let \(A^S = (1/2)(A + A^T)\) be it’s symmetric counterpart. Show \(x^TAx > 0\) for all \(x \neq 0\) if and only if \(A^S\) is positive definite. WTS \(A^S\) is positive definite \(\Leftrightarrow\) \(x^T A x...

  • Optimization - Linear Algebra Review

    Linear Algebra Review Notes Or, everything you ever needed to know from linear algebra. Vectors Elements \(\mathbf{v}\) in \(\mathbb{R}^n\) are Vectors. A vector can be thought of as \(n\) real numbers stacked on top of each other (column vectors). \[\mathbf{v} = \left( \begin{array}{c} v_1\\ v_2\\ \vdots\\ v_n \end{array} \right)\] Properties...

  • 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...