Internal apc functions
Bent Nielsen <bent.nielsen@nuffield.ox.ac.uk> 25 Jun 2025 (1 Feb 2016)
These are not to be called by the user.
function.coin is used the coin problem that is relevant for mixed arrays.
Given coins of value G,H, it returns the Frobenius number, the Sylvester number
and the number of Non-Representable amounts.
function.coin.array is used the coin problem that is relevant for mixed arrays.
Given r.g G-coins and r.h H-coins, it returns an array of all possible amounts that can be paid.