Media type: E-Article Title: A Variational Approach to Lagrange Multipliers Contributor: Borwein, Jonathan M.; Zhu, Qiji J. Published: Springer Science and Business Media LLC, 2016 Published in: Journal of Optimization Theory and Applications, 171 (2016) 3, Seite 727-756 Language: English DOI: 10.1007/s10957-015-0756-2 ISSN: 0022-3239; 1573-2878 Origination: Footnote: