Mathematics for Economists

(Greg DeLong) #1

Calculus of variations


Asyis an arbitrary function, hencey(b)andy(a)is also arbitrary, so ifx
is an optimal solution then

Fx^0




t,x(t),


x(t)




=


d
dtF
^0
x




t,x(t),


x(t)




φ^0 b(x(b)) = Fx^0 




b,x(b),


x(b)




φ^0 a(x(a)) = Fx^0 




a,x(a),x(a)




DeÖnition


The last two conditions are called the transversality conditions.
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