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Table 2. 

(a) The core species of the chemical perceptron with the mapping to the variables of a perceptron. Each variable is either of type Boolean with the domain {0, 1}, or Real with the domain ℝ. The nonzero concentration of species represents a value of the variable on a domain subset as specified by the domain restriction column. The name of a group or subgroup is used to refer to the associated species. (b) The extra species of the weight-loop perceptron, which do not map to the variables of a formal perceptron: the processed weights , and the fuel E. Again, the name of a group or subgroup is used to refer to the associated species.

(a)
(b)
Group
Subgroup
Variable
Domain
Species
Domain restriction
Group
Subgroup
Species
X X1 x1 {0, 1} X10 x1 = 0    
    X11 x1 = 1    
 X2 x2 {0, 1} X20 x2 = 0    
    X21 x2 = 1    
        
Y  y {0, 1} Y0 y = 0    
         
    Y1 y = 1    
      E  E 
D  d {0, 1} D0 d = 0    
    D1 d = 1    
 
W W0 w0 ℝ W0 w0 > 0    
    W0 w0 < 0    
 W1 w1 ℝ W1 w1 > 0    
    W1 w1 < 0    
 W2 w2 ℝ W2 w2 > 0    
    W2 w2 < 0    
(a)
(b)
Group
Subgroup
Variable
Domain
Species
Domain restriction
Group
Subgroup
Species
X X1 x1 {0, 1} X10 x1 = 0    
    X11 x1 = 1    
 X2 x2 {0, 1} X20 x2 = 0    
    X21 x2 = 1    
        
Y  y {0, 1} Y0 y = 0    
         
    Y1 y = 1    
      E  E 
D  d {0, 1} D0 d = 0    
    D1 d = 1    
 
W W0 w0 ℝ W0 w0 > 0    
    W0 w0 < 0    
 W1 w1 ℝ W1 w1 > 0    
    W1 w1 < 0    
 W2 w2 ℝ W2 w2 > 0    
    W2 w2 < 0    
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