In mathematics , statistics , and the mathematical sciences , a parameter -LRB- G : auxiliary measure -RRB- is a quantity that defines certain characteristics of systems or functions that serves to relate functions and variables using a common variable -LRB- often t -RRB- when such a relationship would be difficult to explicate with an equation .

In mathematics , statistics , and the mathematical sciences , parameters -LRB- L : auxiliary measure -RRB- are quantities that define certain relatively constant characteristics of systems or functions .
