function discrep=ckf(x,xl,a,alph,bet,gam,delt)
%function discrep=ckf(x,xl,a,alph,bet,gam,delt)
discrep=zeros(2,1);
C=x(1);K=x(2);CL=xl(1);KL=xl(2);
discrep(1)=C+K-exp(a)*KL^alph-delt*KL;
discrep(2)=CL^(-gam)-(exp(a)*KL^(alph-1)*alph+delt)*bet*C^(-gam);