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Homework Statement
Which branch of mathematics predominates in the equation below?
Homework Equations
Source: http://en.wikipedia.org/wiki/Taylor_rule
The Attempt at a Solution
I know that a line over a number can mean either a statistical mean or a complex conjugate, and that a star in the exponent of a number is usually used to specify either a complex conjugate or delta x in Riemann sums.
Which is the case in this equation? I think that it's most likely complex conjugate notation, but I'm not sure. Oh, and the main question is: Which branch of mathematics predominates in this equation?