mind.root

A blog that gets to the roots of things.

Featured

• Editorial: "Catch the Mole"

  16 Jul, 2025

  An editorial for the Codeforces problem "Catch the Mole."

• The Sprague-Grundy theorem

  12 Jul, 2025

  Motivating the Sprague-Grundy theorem from first principles.

• The mirror formula

  15 May, 2025

  A simple proof of the mirror formula.

• Hessians

  13 May, 2025

  What does the Hessian matrix really mean?

• Burnside's lemma

  3 Feb, 2025

  An intuitive introduction to Burnside's lemma.

• Haskell: #1

  21 Jan, 2025

  A quick intro to the world of Haskell and functional programming.

Recent Posts

• Editorial: "Breakdown"

  25 Jan, 2025

  My editorial for the USACO problem "Breakdown."

• About this blog

  22 Jan, 2025

  Some meta-information about this blog's setup and workflow.