function lam_msg = compute_lambda_msg_adder(bnode, bnet, p)

n = bnode.self;
arity = bnode.self_size;
lam_msg = zeros(arity, 1);
my_lam = bnet.pearl.msg{n}.lambda;

for u=1:arity
  x = wrap(u+bnode.delta, arity);
  lam_msg(u) = my_lam(x);
end
