 Consider the function

defined on the set of all "n"-tuples formula_2 of non-zero complex numbers with values in the Euclidean space formula_3 given by the formula

Here, log denotes the natural logarithm.If "p"("z") is a polynomial in formula_5 complex variables, its amoeba formula_6 is defined as the image of the set of zeros of "p" under Log, so

Amoebas were introduced in 1994 in a book by Gelfand, Kapranov, and Zelevinsky.A useful tool in studying amoebas is the Ronkin function.