' - - File: IV_Par2.txt   

a = -1E-1  :  b = 2.345  :  c = b - a^2                 ' Sample values.

F{x,y,z} = x^2 - x*y + y*z^3  :  ma = F{a,b,c}
Fa{x,y,z} = Diff[F,x]  :              mx = Fa{a,b,c}
Fb{x,y,z} = Diff[F,y]  :              my = Fb{a,b,c}
Fc{x,y,z} = Diff[F,z]  :              mz = Fc{a,b,c}
' - - - - - - - - - - -

C{x,y,z} = F{Fa{x,y,z},Fb{x,y,z}, Fc{x,y,z}}
c2 = C{a,b,c}
' - - - - - - - - - - -

ca = F{Fa{a,b,c}, Fb{a,b,c}, Fc{a,b,c}}
cb = F{mx,my,mz}
Da{x,y,z} = Diff[F,x] ^ 2 - Diff[F,x] * Diff[F,y] + Diff[F,y] * Diff[F,z]^3
' - - - - - - - - - - -
' Other combinations possible:
H{x,y} = Fc{x,y,a}  :  M{y,z} = Fc{b,y,z}  :  R{x} = Fc{x,a,b}

<x = a; y = b; z = c>

'- - - Diff[ in direct parameters not allowed: D{x,y,z} = F{Diff[F,x] , Diff[F,y] , Diff[F,z] }


