安全归约导论 郭福春 《安全归约导论》 · 第 196 页 · Chapter 10「Matrix Inequalities」，定义段 Let $f_1,\ldots,f_m$ be an ordered set of vectors in a Euclidean space. The matrix $G$ with entries $G_{ij}=(f_j,f_i)$ is called the Gram matrix of the set of vectors. 查看原书页面
