| firsty.mp4 | Something is better than nothing. |
| first.mp4 | Learning about the variable known as time. |
| second.mp4 | Nice, it's sinusoidal! 0-dimensional. |
| third.mp4 | A sine in 1-d. |
| fourth.mp4 | 2-D Sine varying with x and y (and time, shown on z) rectilinearly. |
| fifth.mp4 | 2D but varying with radius not x & y. Equal energy in each ring. |
| sixth.mp4 | Semi-3D: 2D wrapped around a sphere. Not equal energy but equal amplitude rings (small rings have less total energy). |
| seventh.mp4 | Equal energy in each ring, again. |
| eighth.mp4 | One going up, another going down, add them together at the same time, you get a standing wave. |
| ninth.mp4 | Two standing waves with different energy levels, different axes on the sphere, different time frequency, different spatial frequency. (There's an absolute value in there to fix: see the discontinuity at one of the equators. |
| tenthy.mp4 | Fixed the absolute value, included some frames from a different run by mistake. |
| tenthish.mp4 | This loop is periodic on the vertical standing wave, but not on the diagonal wave, which jumps 180 degrees at the loop instant. |
| eleventh.mp4 | There we go. Two cycles on the vertical for three cycles on the diagonal. Still equal-energy rings. Pine-cones and coronaviruses aren't so polarly-peaky. |
| twelfth.mp4 | That's getting a bit closer to a pine cone, in principle. |
