View source for McCulloch-Pitts neuron/Block diagram

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| <span style="font-size:1.1em;"><center>
<mm>\xymatrix{
      I_1  \ar[drr]^{w_1} &  & \\
     \vdots \ar@{.>}[rr] &  & *++[o][F-]{\sum} \ar@{<.}[ll]!<0.5em,1.75em> \ar@{<.}[ll]!<0.5em,-1.75em> \ar@{<-}[d]!<0em,1em>_(.9){\theta} \ar[r]^-{\text{net}} & *+[o][F-]{\mathcal{A}(\cdot)} \ar[r] & \text{Output}\\ 
     I_n \ar[urr]_{w_n} & & &
} </mm></center></span>
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! Diagram of a McCulloch-Pitts [[neuron (neural network)|neuron]]
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