costate


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costate

[′kä‚stāt]
(biology)
Having ribs or ridges.
References in periodicals archive ?
Given the solution value of the costate variable v, the necessary condition for optimality of the control z is that it should maximize [Mathematical Expression Omitted
Optimum choice of control variable a depends upon the value of the costate variable [v.
is more densely costate than other high-whorled species of Tegoceras, except for T.
The remainder of this note briefly presents the typical formulation of the problem and the standard result, explains why the pertinent costate variable in that setup is negative, and thus reconciles existing derivations with the intuition deriving from Corlett and Hague.
where [lambda] is a conventional Lagrange multiplier (here indicating the shadow value of a dollar in resources or, equivalently, government revenue) and [mu](w) is the costate variable, a shadow price concerning the incentive constraint in expression (4).
Thus, the assignment of this genus with coarsely costate ornament, a strongly uniplicate anterior margin, and with deep exopuncta (which may be the remains of granulation) to this family remains tentative.
Vinlandostrophia species having shells quadrate to subquadrate in outline, with maximum width in anterior third of shell; radial ornament of angular costate, three costae in sulcus, four on fold and six to eight costae on flanks of both valves; ventral sulcus and dorsal fold prominent, shallow to moderately deep; septalium V-shaped.
We then adapt this set of efficiency conditions to the King-Plosser-Rebelo framework by introducing two new variables, one a costate variable and the other a "costate-like" variable.
Substituting out the control vector [Mathematical Expression Omitted] using the linear feedback rule [Mathematical Expression Omitted] gives a single linear difference equation in the state-costate vector [Mathematical Expression Omitted], which can be solved for paths of the endogenous state and costates in terms of the path of the exogenous state variable and initial and terminal conditions.
where [Lambda] is the costate variable which can be interpreted as the imputed value of saving, measured in utility terms.
As was the case for the preceding model, the costate variables can be eliminated from equations (28) to (31) and, irrespective of whether the constraint on dividends is binding, one can solve for the capital stock in terms of the determinants of the firm's marginal revenue product (|Alpha~,|Beta~) and its marginal cost of capital |q(|Rho~ + |Delta~ + 2|Psi~|Phi~ - |Psi~||Phi~.