Weak Formulation - General Concept

General Concept

Let be a Banach space. We want to find the solution of the equation

,

where and, with being the dual of .

Calculus of variations tells us that this is equivalent to finding such that for all holds:

.

Here, we call a test vector or test function.

We bring this into the generic form of a weak formulation, namely, find such that

by defining the bilinear form

Since this is very abstract, let us follow this by some examples.

Read more about this topic:  Weak Formulation

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