Implicit (Backwards) Euler's Method

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SUMMARY

The discussion focuses on the implementation of the implicit Euler's method for numerical integration, specifically addressing the need for a function f(U,t) to compute dU/dt. The user expresses confusion regarding the calculation of the next variable, Un+1, given the current value of U and the time step dT. The conversation also references the explicit Euler method as a foundational concept for understanding the implicit variant.

PREREQUISITES
  • Understanding of numerical integration techniques
  • Familiarity with the explicit Euler method
  • Knowledge of differential equations
  • Basic programming skills for implementing algorithms
NEXT STEPS
  • Study the implementation of implicit Euler's method in Python using libraries like NumPy
  • Explore the derivation and application of the function f(U,t) in numerical methods
  • Learn about stability and convergence analysis of implicit methods
  • Investigate other numerical integration techniques such as Runge-Kutta methods
USEFUL FOR

Mathematicians, engineers, and computer scientists involved in numerical analysis, particularly those working with differential equations and numerical integration methods.

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How would one go about solving for one variable for an implicit Euler's method such as this:

I am completely lost...all I know is the value of U and dT

Un+1 = Un + (dU/dT)|n+1dT
Vn+1 = Vn + (dV/dT)|n+1dT
 
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No matter what numerical integration technique you use, you are going to need some function f(U,t) that calculates dU/dt.

Regarding implicit Euler, do you know how explicit Euler works?
 

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