@article {MR2473311, AUTHOR = {Chen, Yanlai and Hesthaven, Jan S. and Maday, Yvon and Rodr{\'{\i}}guez, Jer{\'o}nimo}, TITLE = {A monotonic evaluation of lower bounds for inf-sup stability constants in the frame of reduced basis approximations}, JOURNAL = {C. R. Math. Acad. Sci. Paris}, FJOURNAL = {Comptes Rendus Math\'ematique. Acad\'emie des Sciences. Paris}, VOLUME = {346}, YEAR = {2008}, NUMBER = {23-24}, PAGES = {1295--1300}, ISSN = {1631-073X}, MRCLASS = {65N12}, MRNUMBER = {2473311}, DOI = {10.1016/j.crma.2008.10.012}, URL = {http://dx.doi.org/10.1016/j.crma.2008.10.012}, }