When I was doing a lot of Physics simulation in Julia, I had a Vim extension which would just allow me to type something like \gamma, hit tab, and get γ. This was worth the (minimal) hassle, because it made it very easy to spot check formulas. When you're shuffling data around in a loosely-described space like most of web dev, descriptive function and variable names are important because the description of what you're doing and what you're doing it too is the important information, and the actual operations you're taking are typically approximately trivial.

In heavily mathematical contexts, most of those assumptions get turned on their head. Anybody qualified to be modifying a model of electromagnetism is going to be intimately familiar with the language of the formulas: mu for permeability, epsilon for permittivity, etc. With that shared context,

1/(4*π*ε)*(q_electron * q_proton)/r^2 is going to be a lot easier to see, at a glance, as Coulombs law

compared to

1 / (4 * Math.Pi * permitivity_of_free_space)*(charge_electron * charge_proton)/distance_of_separation

Source code, like any other language built for humans, is meant to be read by humans. If those humans have a shared context, utilizing that shared context improves the quality and ease of that communication.