Let a < b and let f(x) be a continuously differentiable function on the interval [a, b] with f(x) > 0 for all x = [a, b]. Let A > 0, B > 0 be constants. S[y] = is given by y(x) [* dx ƒ(x) √ 1 + y^², _y(a) = A₁ y(b) = B, A, a = A+B 1² d dw 1 √f (w)² - 3² where is a constant satisfying b B-A= B 3 [º a 1 √f(w)² - 32 Using the Jacobi equation, show that the stationary path gives a weak local minimum of the functional S[y]. dw

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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Let a < b and let f(x) be a continuously differentiable function on the
interval [a, b] with f(x) > 0 for all x = [a, b].
Let A > 0, B > 0 be constants.
S[y] =
is given by
y(x)
=
[* dx f(x)√1+y¹², _y(a) = A₁ y(b) = B,
A,
a
A+B
1² d
dw
b
B-A= B 3 [º
a
where is a constant satisfying
1
√f (w)² - 3²
1
√f(w)² - 32
Using the Jacobi equation, show that the stationary path
gives a weak local minimum of the functional S[y].
dw
Transcribed Image Text:Let a < b and let f(x) be a continuously differentiable function on the interval [a, b] with f(x) > 0 for all x = [a, b]. Let A > 0, B > 0 be constants. S[y] = is given by y(x) = [* dx f(x)√1+y¹², _y(a) = A₁ y(b) = B, A, a A+B 1² d dw b B-A= B 3 [º a where is a constant satisfying 1 √f (w)² - 3² 1 √f(w)² - 32 Using the Jacobi equation, show that the stationary path gives a weak local minimum of the functional S[y]. dw
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