 Negligible function

In mathematics, a negligible function is a function formula_1 such that for every positive integer "c" there exists an integer "N""c" such that for all "x" > "N""c",

Equivalently, we may also use the following definition.A function formula_1 is negligible, if for every positive polynomial poly(·) there exists an integer "N"poly > 0 such that for all "x" > "N"poly

The concept of "negligibility" can find its trace back to sound models of analysis.