function fval = tryphi(A,phi)

[m,m,T] = size(A);

nn = T+1;

n = T+1;

global C
C = zeros(m,1); C(2)=1;

global nstate lenseq
nstate = m;
lenseq = n;

adim = m^2*T;
fdim = m^nn;
xdim = adim + fdim;

x = [A(:); phi(:)];

fval = sqrt(abs(myobjm(x)));

return


function y = myobjm(x)
global nstate lenseq
global FN
m = nstate;
n = lenseq;
T = lenseq-1;


global GG

adim = m^2*T;
fdim = m^n;
xdim = adim + fdim;

global A
%A = reshape(x,[m m T]);
A = reshape(x(1:adim),[m m T]);
FN{n} = reshape(x(adim+1:end),[1 m^n]);

GG = [];
for k=1:m
  gam = gamma(T,[k]);
  GG = [GG; gam'];
end

% GG(k,k')
% summing across k'

a = A(:,:,T);
s = sum(sum(a.*GG));

y = -s^2;
return


function r = F(x)
%r = length(find(x~=1));
%return
global nstate
lenseq = length(x);
global FN
FF = FN{lenseq};
ind = coord2ind(x,(repmat(nstate,1,lenseq)));
r = FF(ind);
return


function p = p_0(x)
global C
p = C(x);
return

function p = p_n(i,j,n)
% primitive cond prob
global A
if i
  p = A(i,j,n);
else
  p = 1;
end
return



function gam = gamma(n,x)
%global nstate
global A
[m,m,t] = size(A);
nstate = m;
gam = zeros(nstate,1);
if (n==2)
  for k=1:nstate
    for x1=1:nstate
      gam(k) = gam(k) + p_0(x1)*(p_n(k ,1 ,1)*F([1 k x]) - p_n(k ,x1,1)*F([x1 k x]));
    end
  end
else
  for k=1:nstate
    gamkx = gamma(n-1,[k x]);
    for k1=1:nstate
      gam(k) = gam(k) + p_n(k,k1,n-1) * gamkx(k1);
    end
  end
end  
return