Alex's Notes

A collection of notes organized in the Zettelkästen style to foster creative thinking.

  • Rule of 72

    Estimate how many weeks it will take for a value to double if it continues to …

  • Formal System

    A formal system consists of axioms (statements that are true) and rules (how …

  • Org-Mode

    A package built into Emacs which combines outlining, task management, …

  • EBNF

    A context-free grammar can be described using Extended Backus–Naur form (EBNF) …

  • Graphviz

    A declarative language for describing diagrams and an environment that renders …

  • Nomenklatura

    The Soviet Ruling class, members of the communist party that control everything. …

  • Modelica

    A modeling programming language and environment that provides a way to express, …

  • Consignment

    Giving a thing to someone else, while still retaining ownership, for the …

  • Zoonotic Virus

    A virus that passes from animals to humans. Examples include: SARS, Swine Flu, …

  • Visitor Pattern

    A pattern for traversing a tree of heterogeneous objects. Decoupling the …

  • Homeostasis

    A state of equilibrium for an organism that is the optimal condition. For …

  • COVID-19

    A corona virus that became a global pandemic. The number of cases has …

  • Literate Programming

    Intertwines documentation and source code which emphasizes the need for code …

  • Silurian Hypothesis

    Posits that there were previous civilizations on Earth before humans. Some …

  • Decision Log

    A document that keeps track of critical decisions made by a team to raise …

  • R Value

    A rating for the ability of a virus to spread. R of 1 would indicate each …

  • Lean Startup

    A framework for starting companies that focuses on better understanding of …

  • Epistemology

    The understanding of knowledge and distinguishing between truth and beliefs. …

  • SPAC IPO

    A shell holding company goes public with the intention of raising money to merge …

  • Plutonomy

    In finance, the plutonomy is the small group of people that control most of the …

  • Tacit Knowledge

    Knowledge that can not be transferred through words alone. For example, it …

  • Sigmoid Function

    A mathematical function that produces an ’S’ shaped curve when …

  • Planck's Principle

    Scientific change doesn’t happen because because people change their …

  • Lindy Effect

    A theory that states, the future of an idea or technology is proportional to how …

  • Hobson’s Choice

    An illusion of a choice between two inequivalent options.

    Hobson ran stable …