Graphmath.Quatern.multiply

You're seeing just the function multiply, go back to Graphmath.Quatern module for more information.
Link to this function

multiply(lhs, rhs)

Specs

multiply(quatern(), quatern()) :: quatern()

multiply(lhs, rhs) multiply two quaternions.

lhs is the first quatern

rhs is the second quatern

It returns a quatern resultant of the multiplication NOTE: Multiplication is not generally commutative, so in most cases pq != qp.