Abstract
The starting point of this chapter is the model problem derived in the previous chapter. Our goal is to specify conditions under which this problem is well-posed. Two important results are presented: the Lax–Milgram lemma and the more fundamental Banach–Nečas–Babuška theorem. The former provides a sufficient condition for well-posedness, whereas the latter, relying on slightly more sophisticated assumptions, provides necessary and sufficient conditions.
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Ern, A., Guermond, JL. (2021). Main results on well-posedness. In: Finite Elements II. Texts in Applied Mathematics, vol 73. Springer, Cham. https://doi.org/10.1007/978-3-030-56923-5_25
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DOI: https://doi.org/10.1007/978-3-030-56923-5_25
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Publisher Name: Springer, Cham
Print ISBN: 978-3-030-56922-8
Online ISBN: 978-3-030-56923-5
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