WD

Archive

  1. Fit the COVID spike data
    A demonstration of a method to fit a model to data
  2. A more pragmatic model
    A growth model with usable parameters
  3. An exponential growth model
    A model for growth of the infected
  4. COVID-19 waves
    How to find the waves in the data
  5. A tunnelling shell surface
    Discover a surface of a seashell created by a spiralling tunnel
  6. A parametric shell surface
    Discover a function for the surface of a seashell
  7. Torus in Asymptote
    Draw a torus in Asymptote
  8. A 3-D seashell spiral
    Discover a mathematical model for the width of a seashell
  9. A seashell spiral
    Discover a spiral that describes the height of a seashell
  10. A seashell's height
    Discover a mathematical model for the height of a seashell