Bivalent BAM theorem -define the individual state changes as: △S,(x)=S,(x,+l)-S,(x;) AS,(y,）=S,y,)-S,(y,) -We assume at least one neuron changes state from k to time k+1. Any subset of neurons in a field can change state,but in only one field at a time. For binary threshold signal functions if a state change is nonzero, 66 Bivalent BAM theorem define the individual state changes as: ( ) ( ) ( ) k i i k i i i i S x = S x − S x +1 ( ) ( ) ( ) k j j k j j j j S y = S y − S y +1 We assume at least one neuron changes state from k to time k+1. Any subset of neurons in a field can change state,but in only one field at a time. For binary threshold signal functions if a state change is nonzero