Abstract : We provide a formula for variational quasi-Newton updates with multiple weighted secant equations. The derivation of the formula leads to a Sylvester equation in the correction matrix. Examples are given.
Serge Gratton, Vincent Malmedy, Philippe Toint. Quasi-Newton updates with weighted secant equations. Optimization Methods and Software, Taylor & Francis, 2015, 30 (4), pp.748-755. ⟨10.1080/10556788.2014.971025⟩. ⟨hal-02147968⟩