Address

Definition

Let [math]n = k + 2^k[/math]. A function [math]f:\{-1,1\}^n \to \{-1,1\}[/math] is called an address function if it returns the bit pointed to by the first [math]k[/math] bits:

[math]f(x_1, \ldots, x_k, y_1,\ldots,y_{2^k}) = y_{\tilde{x}}, [/math]

where [math]\tilde{x}[/math] is number whose binary representation of the vector [math](x_1,\ldots, x_k)[/math].

Properties

• Please add some properties! Start off with relation to Juntas.