Hello and welcome to my corner of the worldwide web.

Mostly I write math and work on analog electronics.

The current writing project is Arithmetic of the Continuum (AotC), a grimoire focused on the theory and method of real analysis and quantum mechanics. The introduction (numbers on the line), chapter one (logic and sets, with an emphasis on lattices), and chapter two (general topology and construction of R) are available to download in PDF form here. Chapter three (modules and measures) is scheduled to be released this spring.

I also have another exposition planned: Rhapsody in C (Rhapsody), which will be a tour of my favorite parts of complex analysis, differential geometry, and electromagnetism. I expect to get to this later in 2026.

In analog electronics, I am interested in chaotic circuits ("aperiodic oscillators"). I built a (barely) functional Chua circuit last December; currently I am focusing on improving this.

contact: justinthomaschun[at]proton[dot]me