8 |

*Output function*. Denote the weight of the connection
between node *i* and node *j* by *w _{ij}*, and let the
current activation of node

and then the output of nodenet= Σ_{j}+_{i}w_{ij}a_{i}extinput_{j}

where,if(net> 0)_{j}

Δa= (_{j}max–a)_{j}net–_{j}decay(a–_{j}rest)

else

Δa= (_{j}a–_{j}min)net–_{j}decay(a–_{j}rest)