1
# declare the scalar x
v x=1
# declare all the parameters, initializing the delay to 3
p tau=0,b=4.8,a=4,p=-.8
# define the nonlinearity
u f 1 1/(1+exp(-arg1))
# define the right-hand sides; delaying x by tau
o -x + f(a*x-b*delay(x,tau)+p)
# done
d
