How do I set my fmincon constraint parameters?

I was trying to use Lagrange multipliers to minimize this function: f(V,N,d,L) = V^2*d^2/(L*N)

given the constraints:

g1(V,N,d,L) = V*d^2*L - A = 0 g2(V,N,d,L) = r_r*N*d*L^2+4*r_l*N*d^2*L - m = 0

where r_r, r_l, A, and m are all constants.

I found that the algebra got way too complicated so I decided to try to use fmincon to optimize it.

My understanding is that I need to use fmincon like this:

x = fmincon(fun,x0,A,b)

Where A and b are a matrix and a vector that account for my constraint functions, but I don't have a clue how to set A and b so they account for the functions g1 and g2 that I've listed above. Can anyone help?

Thanks to anyone who has an answer!!!!!

Answer 1

[Sargondjani]

you can insert them as nonlinear constraints (as functions, see the documentation).