Chapter 3.Neural Dynamics II:Activation Models The weighted outer-product law: m M=∑wXiY Where∑w&=1 holds. In matrix notation: M=XWY Where XT=[X.Xm] Yr=[YI…lYm] W=Diagonal[w1,…,wm] 2002.10.82002.10.8 Chapter 3. Neural Dynamics II:Activation Models The weighted outer-product law: In matrix notation: Where holds. =  m k k T M wk X k Y  = m k wk 1 M X WY T = Where [ | | ] 1 T m T T X = X  X [ , , ] W = Diagonal w1  wm [ | | ] 1 T m T T Y = Y  Y