jasminefeng的博客

对(7.22)到(7.23)进行一个推导（不保证严谨性）已知：Hi,i>0,α>0,wi在wi∗某邻域U(wi,δ)内，δ充分小使得sign(wi)=sign(wi∗)H_{i,i}>0,\alpha>0,w_i在w_i^*某邻域U(w_i,\delta)内，\delta充分小使得\mathrm{sign}(w_i)=\mathrm{sign}(w_i^*)Hi,i​>0,α>0,wi​在wi∗​某邻域U(wi​,δ)内，δ充分小使得sign(wi​)=sign(wi