@article{10_21136_AM_2017_0022_17,
     author = {Yamamoto, Yusaku},
     title = {On the optimality and sharpness of {Laguerre's} lower bound on the smallest eigenvalue of a symmetric positive definite matrix},
     journal = {Applications of Mathematics},
     pages = {319--331},
     publisher = {mathdoc},
     volume = {62},
     number = {4},
     year = {2017},
     doi = {10.21136/AM.2017.0022-17},
     mrnumber = {3686420},
     zbl = {06770047},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.2017.0022-17/}
}