Purchase Solution

The flow invariant for the nonlinear system

Not what you're looking for?

Ask Custom Question

Please solve the following numerical analysis problem:

Determine the flow Qt : R^2 into R^2 for the nonlinear system: x' =f(x) with

f(x) = [ -x1 ]
[ x1^2 + 2x2 ]
and show that the set S = { x E R^2l x2 = -x^2/4 } is invariant with respect to the flow {Qt}.

Please use the step by step method to show the solution.

Purchase this Solution

Solution Summary

This posting provides a solution to a first order linear differential equation initial value problem. It provides a step by step method with the calculations for the flow invariant for a nonlinear system.

Solution Preview

See the attached file.

Problem: Determine the flow Qt : R^2 into R^2 for the nonlinear system: x' =f(x) with
f(x) = [ -x1 ]
[ x1^2 + 2x2 ]
and show that the set S = { x E R^2l x2 = -x^2/4 } is invariant with respect to the flow {Qt}.

Solution:

Determine Qt:

Start by solving: x1' = -x1 => x1 = Ce^-t.

Plug that result into x2' = x1^2 + 2x2 and solve for x2.
x2' = ...

Purchase this Solution


Free BrainMass Quizzes
Graphs and Functions

This quiz helps you easily identify a function and test your understanding of ranges, domains , function inverses and transformations.

Multiplying Complex Numbers

This is a short quiz to check your understanding of multiplication of complex numbers in rectangular form.

Probability Quiz

Some questions on probability

Exponential Expressions

In this quiz, you will have a chance to practice basic terminology of exponential expressions and how to evaluate them.

Know Your Linear Equations

Each question is a choice-summary multiple choice question that will present you with a linear equation and then make 4 statements about that equation. You must determine which of the 4 statements are true (if any) in regards to the equation.