## Broyden's quasi-Newton methods for a nonlinear system of equations and unconstrained optimization: a review and open problems

- Mehiddin Al-Baali, Emilio Spedicato, Francesca Maggioni
- Optimization Methods and Software
- 2014

@inproceedings{Lucia2010AnEQ, title={An Explicit Quasi-Newton Update for Sparse Optimization Calculations}, author={A. Lucia}, year={2010} }

- Published 2010

A new quasi-Newton updating formula for sparse optimization calculations is presented. It makes combined use of a simple strategy for fixing symmetry and a Schubert correction to the upper triangle of a permuted Hessian approximation. Interesting properties of this new update are that it is closed form and that it does not satisfy the secant condition at… CONTINUE READING

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