Px是首项系数为1的勒让德多项式Q_nxin H_n是任一首项系数为1的多项式则int_-1^1P^2 dxleint_-1^1Q^2 dx重复这句话

The statement is: For any polynomial (Q_n(x)) with leading coefficient 1 in the space (H_n), and the Legendre polynomial (P(x)) with leading coefficient 1, we have (\int_{-1}^{1}P^2 dx)(\le)(\int_{-1}^{1}Q^2 dx).