y' = f(y, t), y(t0) = y0. (i) what conditions guaranteeing a unique solution to the...
y' = f(y, t), y(t0) = y0.
(i) what conditions guaranteeing a unique solution to the nonlinear initial value problem
(ii) After checking the conditions, state what the theorem predicts for the initial value problem y' = (-x2 )/y , y(1) = 0.
(iii) Solve the above initial value problem and find two distinct solutions
(iv) Explain if results in (iii) and in (ii) contradict each other
Homework Answers
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y' = f(y, t), y(t0) = y0. (i) what conditions guaranteeing a unique solution to the...
Problem 2. (a) Solve the initial value problem I y' + 2y = g(t), 1 y(0)...
Problem 2. (a) Solve the initial value problem I y' + 2y = g(t), 1 y(0) = 0, where where | 1 if t < 1, g(t) = { 10 if t > 1 (t) = { for all t. Is this solution unique for all time? Is it unique for any time? Does this contradict the existence and uniqueness theorem? Explain. (b) If the initial condition y(0) = 0 were replaced with y(1) = 0, would there necessarily be...
2. Solve (i) Find the general solution of y" + y' = 0. Here, don't have...
2. Solve (i) Find the general solution of y" + y' = 0. Here, don't have to check the Wronskain not zero for the fundamental set of solutions. (ii) For the initial conditions y(e) = e, y'(e) = sin(e), y" (e) = e and y"(e) = e sin(e), show that there is a unique solution satisfying the conditions. (Hint: you don't have to explicitly solve for it)
Consider the initial value problem x^2 dy/dx = y - xy, y(-1) = 1 Use the...
Consider the initial value problem x^2 dy/dx = y - xy, y(-1) = 1 Use the Existence and Uniqueness theorem to determine if solutions will exist and be unique. Then solve the initial value problem to obtain an analytic solution.
1 Let f (t), g(t) be a continuous function on some interval I, and to e I. Prove that the initial value problem y'(t) f(t)y + g(t)y2, y(to) zo has a unique and continuous solution φ(t) on a s...
1 Let f (t), g(t) be a continuous function on some interval I, and to e I. Prove that the initial value problem y'(t) f(t)y + g(t)y2, y(to) zo has a unique and continuous solution φ(t) on a small interval containing to, φ(t) satisfies the initial condition φ(to) = to.
1 Let f (t), g(t) be a continuous function on some interval I, and to e I. Prove that the initial value problem y'(t) f(t)y + g(t)y2, y(to) zo has...
(17 points) (a) Find the general solution of the differential equation y" (t) + 4y(t) =...
(17 points) (a) Find the general solution of the differential equation y" (t) + 4y(t) = 0. general solution = (Use the letters A and B for any constants you have in your solution.) (b) For each of the following initial conditions, find a particular solution. (i) y(0) = 0, y'(0) = 1: y = (ii) y(0) = 1, y'(0) = 0:y= (iii) y(0) = 1, y(1) = 0:y= (iv) y(0) = 0, y(1) = 1: y = (On a...
I posted this before but I could not really understand the hand writing. Existence and Uniqueness...
I posted this before but I could not really understand
the hand writing.
Existence and Uniqueness of Solutions For what values of (ro. y0) does the initial value problem ay = V. y(zo) = yo. have a unique solution?
Differential equation 1. Chapter 4 covers differential equations of the form an(x)y("4a-,(x)ye-i) + +4(x)y'+...
Differential equation
1. Chapter 4 covers differential equations of the form an(x)y("4a-,(x)ye-i) + +4(x)y'+4(x)-g(x) Subject to initial conditions y)oyy-Co) Consider the second order differential equation 2x2y" + 5xy, + y-r-x 2- The Existence of a Unique Solution Theorem says there will be a unique solution y(x) to the initial-value problem at x=而over any interval 1 for which the coefficient functions, ai (x) (0 S is n) and g(x) are continuous and a, (x)0. Are there any values of x for...
Theorem 2.3.1 If f is continuous on an open rectangle (a) that contains (xo yo) then the initial value problem f(a, y), y(o)yo has at least one solution on some open subinterval of (a, b) that co...
Theorem 2.3.1 If f is continuous on an open rectangle (a) that contains (xo yo) then the initial value problem f(a, y), y(o)yo has at least one solution on some open subinterval of (a, b) that contains ro (b) If both fand fy are continuous on R then (2.3.1) has a unique solution on some open subinterval of (a, b) that contains ro. In Exercises 1-13 find all (xo, Vo) for which Theorem 2.3.1 implies that the initial value problem...
Problem 3. Given the initial conditions, y(0) from t- 0 to 4: and y (0 0, solve the following initial-value problem...
Problem 3. Given the initial conditions, y(0) from t- 0 to 4: and y (0 0, solve the following initial-value problem d2 dt Obtain your solution with (a) Euler's method and (b) the fourth-order RK method. In both cases, use a step size of 0.1. Plot both solutions on the same graph along with the exact solution y- cos(3t). Note: show the hand calculations for t-0.1 and 0.2, for remaining work use the MATLAB files provided in the lectures
Problem...
Given the initial-value problem y'=2-2tyt2+1, 0 ≤t≤1, y0=1 With exact solution yt= 2t+1t2+1 Using MATLAB use...
Given the initial-value problem y'=2-2tyt2+1, 0 ≤t≤1, y0=1 With exact solution yt= 2t+1t2+1 Using MATLAB use Euler’s method with h = 0.1 to approximate the solution of y
Problem 2. (a) Solve the initial value problem I y' + 2y = g(t), 1 y(0) = 0, where where | 1 if t < 1, g(t) = { 10 if t > 1 (t) = { for all t. Is this solution unique for all time? Is it unique for any time? Does this contradict the existence and uniqueness theorem? Explain. (b) If the initial condition y(0) = 0 were replaced with y(1) = 0, would there necessarily be...
2. Solve (i) Find the general solution of y" + y' = 0. Here, don't have to check the Wronskain not zero for the fundamental set of solutions. (ii) For the initial conditions y(e) = e, y'(e) = sin(e), y" (e) = e and y"(e) = e sin(e), show that there is a unique solution satisfying the conditions. (Hint: you don't have to explicitly solve for it)
1 Let f (t), g(t) be a continuous function on some interval I, and to e I. Prove that the initial value problem y'(t) f(t)y + g(t)y2, y(to) zo has a unique and continuous solution φ(t) on a small interval containing to, φ(t) satisfies the initial condition φ(to) = to.
1 Let f (t), g(t) be a continuous function on some interval I, and to e I. Prove that the initial value problem y'(t) f(t)y + g(t)y2, y(to) zo has...
(17 points) (a) Find the general solution of the differential equation y" (t) + 4y(t) = 0. general solution = (Use the letters A and B for any constants you have in your solution.) (b) For each of the following initial conditions, find a particular solution. (i) y(0) = 0, y'(0) = 1: y = (ii) y(0) = 1, y'(0) = 0:y= (iii) y(0) = 1, y(1) = 0:y= (iv) y(0) = 0, y(1) = 1: y = (On a...
I posted this before but I could not really understand
the hand writing.
Existence and Uniqueness of Solutions For what values of (ro. y0) does the initial value problem ay = V. y(zo) = yo. have a unique solution?
Differential equation
1. Chapter 4 covers differential equations of the form an(x)y("4a-,(x)ye-i) + +4(x)y'+4(x)-g(x) Subject to initial conditions y)oyy-Co) Consider the second order differential equation 2x2y" + 5xy, + y-r-x 2- The Existence of a Unique Solution Theorem says there will be a unique solution y(x) to the initial-value problem at x=而over any interval 1 for which the coefficient functions, ai (x) (0 S is n) and g(x) are continuous and a, (x)0. Are there any values of x for...
Theorem 2.3.1 If f is continuous on an open rectangle (a) that contains (xo yo) then the initial value problem f(a, y), y(o)yo has at least one solution on some open subinterval of (a, b) that contains ro (b) If both fand fy are continuous on R then (2.3.1) has a unique solution on some open subinterval of (a, b) that contains ro. In Exercises 1-13 find all (xo, Vo) for which Theorem 2.3.1 implies that the initial value problem...
Problem 3. Given the initial conditions, y(0) from t- 0 to 4: and y (0 0, solve the following initial-value problem d2 dt Obtain your solution with (a) Euler's method and (b) the fourth-order RK method. In both cases, use a step size of 0.1. Plot both solutions on the same graph along with the exact solution y- cos(3t). Note: show the hand calculations for t-0.1 and 0.2, for remaining work use the MATLAB files provided in the lectures
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