@article{mes-tou-06-aa-quadr, author = {Messine, F. and Touhami, A.}, title = {A General Reliable Quadratic Form: {An} Extension of Affine Arithmetic}, journal = {Reliable Computing}, volum = {12}, pages = {171--192}, year = 2006, doi = {10.1007/s11155-006-7217-4}, comment = {Degree 2 extension of AA. Use in optimization.}, abstract = {In this article, a new extension of affine arithmetic is introduced. This technique is based on a quadratic form named general quadratic form. We focus here on the computation of reliable bounds of a function over a hypercube by using this new tool. Some properties of first quadratic functions and then polynomial ones are reported. In order to show the efficiency of such a method, ten polynomial global optimization problems are presented and solved by using an interval branch-and-bound based algorithm.} }