Tag: 3b1b

But what is a Fourier series? From heat flow to circle drawings | DE4

Here, we look at the math behind an animation like this, what’s known as a “complex Fourier series”. Each little vector is rotating at some constant integer frequency, and when you add them all together, tip to tail, they draw out some shape over time. By tweaking the initial size and angle of each vector, […]

Some light quantum mechanics (with minutephysics)

You guys know Henry from MinutePhysics, right? Well, he and I just made a video on a certain quantum mechanical topic – “Bell’s inequalities”. It’s a really mind-warping topic that not enough people know about, and even though it’s a quantum thing, it’s based on some surprisingly simple math, and you should definitely check it […]