This article explains how derivatives, gradients, Jacobians, and Hessians fit together and shows examples of what they are used for, including optimization and rendering.
   
    
 
 
  
   
   An experiment using e-paper displays to show current weather, integrating hardware like ESP32 and Cloudflare Workers for software layers.
   
    
 
 
  
   
   David Johnson-Davies explains how to efficiently and accurately smooth characters for small displays, using a routine to programmatically smooth out corners and adding hinting functionality.