Abstract
We consider a biharmonic problem Δ2uω = fω with Navier type boundary conditions uω = Δuω = 0, on a family of truncated sectors Ωω in ℝ2 of radius r, 0 < r < 1 and opening angle ω, ω ∈ (2π/3, π] when ω is close to π. The family of right-hand sides (fω)ω∈(2π/3, π] is assumed to depend smoothly on ω in L2(Ωω). The main result is that uω converges to uπ when ω → π with respect to the H2-norm. We can also show that the H2-topology is optimal for such a convergence result.
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Acknowledgment
Gratefully, the authors would like to express their thanks and appreciation for the valuable efforts made by the reviewer in order to substantially improve the latest version of the draft.
This work was initiated differently during the PhD studies of the first author. He wishes to express his gratitude to everyone who contributed to this. In particular, his supervisors: Philippe Tchamitchian, Professor at Aix-Marseille University, Marseille, France, for his valuable and helpful guidance to achieve some results in this context, and Boubakeur Merouani, Professor at the Ferhat Abbas University Setif 1 of Algeria, whose remarks and comments were very beneficial for him to understand some interesting aspects of the biharmonic problems.
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The research has been supported by the Ministry of Higher Education and Scientific Research within the framework of PRFU university training projects.
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Tami, A., Tlemcani, M. H2 Convergence of Solutions of a Biharmonic Problem on a Truncated Convex Sector Near the Angle π. Appl Math 66, 383–395 (2021). https://doi.org/10.21136/AM.2021.0284-19
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DOI: https://doi.org/10.21136/AM.2021.0284-19