by Carstensen, C. and Puttkammer, S.
Reference:
Carstensen, C. and Puttkammer, S.: Direct guaranteed lower eigenvalue bounds with optimal a priori convergence rates for the bi-Laplacian, SIAM J. Numer. Anal., volume 61, pp. 812–836, 2023. [full text]
Bibtex Entry:
@article{CP21b,
title = {Direct guaranteed lower eigenvalue bounds with optimal a priori
convergence rates for the bi-{Laplacian}},
author = {Carstensen, C. and Puttkammer, S.},
volume = {61},
number = {2},
pages = {812-836},
year = {2023},
doi = {10.1137/21M139921X},
url = {https://doi.org/10.1137/21M139921X},
journal = {SIAM J. Numer. Anal.},
Xbtbrowserfulltext = {../download/2021-CC_SP-direct_GLB_for_the_bi-Laplacian.pdf},
}