This page will contain some basic notation.
- or 𝔽2 is the binary space;
- or 𝔽2𝑛 is the binary vector space of dimension 𝑛;
- or 𝔽2𝑛 is the finite field with 2𝑛 elements;
- 𝑊𝐹 is the Walsh transform of the function 𝐹;
- 𝑛𝑙(∙) or 𝒩ℒ(∙) indicates the nonlinearity of a function;
- 𝒟𝑎𝐹 is the derivative of the function 𝐹 in the direction of 𝑎;
- 𝐺𝐹 is the graph of 𝐹;