@article{10902/31588, year = {2023}, month = {5}, url = {https://hdl.handle.net/10902/31588}, abstract = {We consider a 3d multi-structure composed of two joined perpendicular thin films: a vertical one with small thickness han and a horizontal one with small thickness hbn. We study the asymptotic behavior, as han and hbntend to zero, of an eigenvalue problem for the Laplacian defined on this multi-structure. We shall prove that the limit problem depends on the value q = limnhbnhan. Precisely, we pinpoint three different limit regimes according to q belonging to]0,+∞[, q equal to +∞, or q equal to 0.We identify the limit problems and we also obtain H1-strong convergence results.}, organization = {The work has partially been supported by Grant PGC2018-098178-B-I00 funded by MCIN and by "ERDF A way of making Europe" and by Grant Ref. 20.VP66.64662 funded by Gobierno de Cantabria-UC.}, publisher = {Springer Nature}, publisher = {Calculus of Variations and Partial Differential Equations, 2023, 62(4), 129}, title = {A spectral problem for the Laplacian in joined thin films}, author = {Gaudiello, Antonio and Gómez Gandarillas, Delfina and Pérez Martínez, María Eugenia}, }