This is a demostration of the Maxwell decoder for the BEC. It allows you to compute MAP and BP thresholds of a given degree distribution.

You should enter the degree distribution as polynomials. There are three different ways of doing it.

• Edge perspective: In this case enter the polynomials as ∑_i λ_i x^i-1, where λ_i is the fraction of edges connected to a variable(check) node of degree i. Notice that the power to x is i-1.
• Node perspective: In this case enter the polynomials as ∑_i ∧_i xⁱ, where ∧_i is the fraction of variable (check) nodes of degree i.
• Number of nodes: This is the same as node perspective except that instead of the fraction of nodes, ∧_i denotes the number of nodes.

Block length is the number of variable nodes.