Question

I am the name for the open circle between two functions that tells who is "plugged into" who. I distinguish

the outer shell from the inner functions. Some say my name sounds like a musical piece or a notebook. Who
am I?

Answer 1

composition,

function composition,

composite function

Explanation:

(f ° g)(x) = f(g(x))

So we would work on this by putting all of g(x) into the x in the f(x).