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Mathematical techniques for the selection of a best element (with respect to some criteria) from the set of available alternatives.
3
votes
1
answer
809
views
Constrainted optimization: merge two constraints into one
Consider the following problem
\begin{align}
&\max_u F(x,u)\\
\text{s.t. }& u \in [0,\bar u].
\end{align}
Any idea how to merge the two constraints $u \geq 0$ and $\bar u - u \geq 0$ into one constra …
12
votes
1
answer
1k
views
Dynamic Optimization: What if the second order condition does not hold?
Consider the following dynamic optimization problem
\begin{align}
&\max_u \int^T_0{F(x,u)dt}\\
\text{s.t.}~& \dot{x} = f(x,u)
\end{align}
FOCs
The Hamiltonian is given by
\begin{align}
H(x,u,\lambda) …
2
votes
Accepted
static/dynamic optimization
\end{align}
But the static optimization would still read
\begin{align}
&U(C(t)):=\max_{c(t-n,n)}\int^\infty_0 u(c(t-n,n))dn \\
&s.t. …
7
votes
1
answer
173
views
Simple Derivation of Maximum Principle
Consider the simplest problem of optimal control
\begin{align}
&\max_u\int^T_0{F(y,u)dt}\\
\text{s.t.} \quad&\dot y = f(y,u)\\
& y(0) = y_0\\
& y(T)~~\text{free}
\end{align}
where $y$ is the sta …
1
vote
1
answer
158
views
Symmetric Cournot equilibrium: suffciency without second order conditon
Let $q_i \in Q = \mathbb R_+$ denote the quantity produced by firm $i \in \{1,2\}$. Further let $\pi_i(q_1,q_2) = (1-q_1-q_2)q_i$ denote the profits of $i$. A Nash equilibrium $(q_1^*,q_2^*) \in Q^2$ …
3
votes
0
answers
68
views
Converging Trajectories and Sufficiency for Optimality
(The question is loosely relatet to this thread.)
In the paper "Feedback Equilibria for a class of non-linear Differential Games" by Mäler et al. it is stated (p. 14)
In fact sufficiency is sati …
1
vote
1
answer
2k
views
Duality of cost minimization and profit maximization
The firm tries to maximize profits $\Pi$
\begin{align}
\max_{K,L}\{\Pi(K,L) = F(K,L) - RK - wL\}
\end{align}
where $F$ is the linear homogeneous production function, $R$ the rental rate of capital $K …
2
votes
0
answers
498
views
Second order condition for symmetric game
\end{align}
I was thinking that there may exists a general theorem from optimization for symmetric actions. …