

Problem 1. For each of the following functions f (x,y,y'), use the Euler-Lagrange equations to derive...
Find and then solve the Euler-Lagrange equations satisfied by minimizers yo of dx. .b (c) Ily(-)]-/ y(x) (y,(x) + xy(x)) dx.
Find and then solve the Euler-Lagrange equations satisfied by minimizers yo of dx. .b (c) Ily(-)]-/ y(x) (y,(x) + xy(x)) dx.
(a) Show that, if y satisfies the Euler-Lagrange equation associated with the integral 2. qy2) dx, I = (6) where p() and q(x) are known functions, then I has the value 12 (b) Show that, if y satisfies the Euler-Lagrange equation associated with (6) and if z(x) is an arbitrary differentiable function for which z(x)z(r2) = 0, (7) 1 then (yyz)da= 0. + Hence show that by replacing y in (6) by the function (y + z), where the condition...
MATLAB HELP 3. Consider the equation y′ = y2 − 3x, where y(0) =
1. USE THE EULER AND RUNGE-KUTTA APPROXIMATION SCRIPTS
PROVIDED IN THE PICTURES
a. Use a Euler approximation with a step size of 0.25 to
approximate y(2).
b. Use a Runge-Kutta approximation with a step size of 0.25 to
approximate y(2).
c. Graph both approximation functions in the same window as a
slope field for the differential equation.
d. Find a formula for the actual solution (not...
A potential (i.e. steady-state, incompressible, inviscid, irrotational) flow can be described by a stream function w(x,y) that minimizes the functional vlv(x,y)- Admissible stream functions v(x,y) must be twice continuously differentiable and satisfy given }ady n( boundary conditions. Determine the Euler-Lagrange (Ostrogradski) equation
9. Use the Lagrange Multiplier to find the relative extreme value of f(x,y) = 2x2 + 3y2 - 2xy constrained by: 2x + y = 18 {Use a table to determ F(x, y, 2) = Ans: Min: (7,4,90)
(4) Let f R -R be a strictly conve:r C2 function and let 0 a) Write the Euler-Lagrange equation for the minimizer u.(x) of the following problem: minimize u subject to: u E A, where A- 0,REC1[0 , 1and u (0 a u(1)b) b) Assuming the minimizer u(a) is a C2 function, prove t is strictly convex
(4) Let f R -R be a strictly conve:r C2 function and let 0
a) Write the Euler-Lagrange equation for the minimizer u.(x)...
Use Lagrange multipliers to find the ends of f(x,y)= 2x2 +3y2 subject to the constraint 3x + 4y = 59
Use the method of Lagrange multipliers to minimize the function subject to the given constraints. f(x,y) = xy where x2 + 4y2 = 4 and x 20 Find the coordinates of the point and the functional value at that point. (Give your answers exactly.) X = y = f(x,y) =
Problem 5. Find saddle points of f(x,y)y sin(a/3). 82+88y6 a local Problem 6. At what point is the function f(x, y) minimum? Problem 7. Use Lagrange multipliers to find the maximum and the minimum of f(x, y) -yz on the sphere centered at the origin and of radius 3 in R3
Problem 5. Find saddle points of f(x,y)y sin(a/3). 82+88y6 a local Problem 6. At what point is the function f(x, y) minimum? Problem 7. Use Lagrange multipliers to find...
3. Find all critical points of dt dt with the constraint PP = 8 0 (c and boundary conditions x(0) - 0, x(1)- 3. Hint: Write the Euler Lagrange equation (there is no dependence on t), and then use the boundary conditions and the constraint to reach a system of 2 equations (with quadratic terms) of two unknown constants a, b Solve it by first finding a quadratic equation for a/b
3. Find all critical points of dt dt with...