Stephen Malina

Linear Algebra Done Right - Chapter 4

Selected Exercises # 4. Suppose $m$ and $n$ are positive integers with $ m \leq n $, and suppose $ \lambda_1, \dots, \lambda_m \in F $. …

Linear Algebra Done Right - Chapter 3

Selected Exercises # 3.D # 7. Suppose $ V $ & $ W $ are finite-dimensional. Let $ v \in V $. Let $$ E = \{ T \in \mathcal L(V, W): T(v) …

Better Project Planning With Prediction Markets

As I understand it, much of Coase’s work focuses on why companies’ internal structures don’t resemble markets all that …

Linear Algebra Done Right - Chapter 2

Intro # I’ve recently been making my way through Axler’s Linear Algebra Done Right and, as a way to motivate myself to continue, …

Babble, Learning, and the Typical Mind Fallacy

Babbling About Babble # In a series of posts on his blog (or LessWrong if you prefer), alkjash writes about “babble” and …

My Interpretation of Movember

(Cross-posted from Facebook.) This is the first time I’ve posted on Facebook in … long. However, at the encouragement of a few …

State of my Mind

This page tracks things about which I’ve changed my mind over time and things about which I’m still confused. For some things, …

Statistical Models - Theory and Practice

Questions # What does the regression equation mean? Is the idea that we get bigger $ r $ values when $ x $ and $ y $ deviate together? What …

Statistical Models - Theory and Practice

Summary # This chapter introduces basic terminology and describes three separate experiments to introduce us to statistical methods in …

JIT Reading

Seibel, James Hague and others have all tried to justify why code reading is so uncommon, and they make good points. But perhaps the …