Michael L. Overton, Robert S. Womersley. Optimality conditions and duality theory for minimizing sums of the largest eigenvalues of symmetric matrices. Math. Program., 62:321-357, 1993.
@article{OvertonW93,
title = {Optimality conditions and duality theory for minimizing sums of the largest eigenvalues of symmetric matrices},
author = {Michael L. Overton and Robert S. Womersley},
year = {1993},
researchr = {https://researchr.org/publication/OvertonW93},
cites = {0},
citedby = {0},
journal = {Math. Program.},
volume = {62},
pages = {321-357},
}