These were the most popular posts I wrote in 2023.

Privacy and encryption

• First names and Bayes’ theorem
• What is the point of a public key fingerprint?
• RSA encryption in practice

Geometry

• A pentagon, hexagon, and decagon walk into a bar
  (source of the image above)
• Calculating the intersection of two circles

Number theory

• Every factorial is a power
• Mediant approximation trick

Linear algebra

• Circulant matrices
• Powers of a 2×2 matrix in closed form
• How Lewis Carroll computed determinants

Miscellaneous

• Small-scale automation
• How to memorize the periodic table

The post Top twelve posts of 2023 first appeared on John D. Cook.