The symbol of Yin-Yang is strangely reminiscent of Empedocles theory of forces as pairs of contraries; that are dynamic; of generation and corruption.
In Economics, one might posit two forces; competition versus cooperation; in classical economics an argument is presented that reduces cooperation to competition; this is one way of achieving a kind of monism.
However when one observes the symbol of Yin-Yang one sees that there is another; it is the two inseparably together; an analogue of this is Hegels Sublation; when a new synthesis is created out of a thesis and it's opposite - the anti-thesis.
Thus two ways of achieving a monism; one by reduction and the other by sublation.
Are these opposites? If they are in what way?
How is this symbol, Yin-Yang theorised within Chinese Philosophy? To what school is it attached?