Modes of Existence: Math, Matter, Mind

There are three modes of existence: math, matter, and mind. What, if any, is the relationship among them? Is one of them the source of the others? This video is a clip from AlwaysAsking.com Episode 9: "Why does anything exist?" Full episode: https://www.youtube.com/watch?v=6hGH-roVl3w Full article: https://alwaysasking.com/why-does-anything-exist/