It's like type parameters usually getting abbreviated to <T>. δ is the go-to symbol for "deviation". In this case, the deviation from 100% correctness probabili

It's like type parameters usually getting abbreviated to <T>. δ is the go-to symbol for "deviation". In this case, the deviation from 100% correctness probability. The Ω is a symbol for expressing asymptotic equivalence, see https://en.m.wikipedia.org/wiki/Big_O_notation https://en.m.wikipedia.org/wiki/Big_O_notation. These are just the arbitrary norms we have collectively settled on. If it had been other symbols, you would have complained just as much. We can write it out in words, sure, but then you get a sort of COBOL equivalent: wordy, hard to skim, annoying and inefficient to write and deal with once you have programming experience, but hey, at least it seems easy and accessible to beginners right? With any user interface, including syntax, including symbols chosen, there's gonna be a group that's going to be impeded. And we collectively settled on impeding novices in favour of empowering those with experience.