@unpublished{carvalho:hal-01394856, TITLE = {{Eigenvalue problems with sign-changing coefficients}}, AUTHOR = {Carvalho, Camille and Chesnel, Lucas and Ciarlet, Patrick}, URL = {https://hal.science/hal-01394856}, NOTE = {working paper or preprint}, YEAR = {2016}, MONTH = Nov, KEYWORDS = {Eigenvalue problem ; Sign changing coefficients}, PDF = {https://hal.science/hal-01394856v1/file/CaCC16.pdf}, HAL_ID = {hal-01394856}, HAL_VERSION = {v1}, }