Source: cirosantilli/mathematical-formulation-of-quantum-mechanics
= Mathematical formulation of quantum mechanics
{wiki}
These are the key mathematical ideas to understand!!
There are actually a few formulations out there. By far the dominant one as of 2020 has been the <Schrödinger picture>, which contrasts notably with the <Heisenberg picture>.
Another well known one is the <de Broglie-Bohm theory>, which is deterministic, but <non-local>.