Arithmetic Layer 
Some text to describe the arithmetic layer within usual ICNs.
List of arithmetic operations 
CompositionalNetworks.ar_sum Function
julia
ar_sum(x)Reduce k = length(x) vectors through sum to a single vector.
CompositionalNetworks.ar_prod Function
julia
ar_prod(x)Reduce k = length(x) vectors through product to a single vector.
Layer generation 
CompositionalNetworks.arithmetic_layer Function
julia
arithmetic_layer()Generate the layer of arithmetic operations of the ICN. The operations are mutually exclusive, that is only one will be selected.