julialang

The example is simple:

using DynamicalSystems

function route(dx, x, p, t)
    dx[1] =  1im * ( p[1] * x[1] - 2 * real(x[2]) * x[1] - 0.5) - 0.05 * x[1]
    dx[2] = -1im * (0.75 * abs(x[1])^2 + x[2]) - 0.0005* x[2]
end

ds = DiscreteDynamicalSystem(route, ComplexF64[0, 0], [1])

Was trying to define a Dynamical system. And:

ArgumentError: Cannot create a dual over scalar t

function add_agent!(A::Type{<:AbstractAgent}, model::ABM, properties...; kwargs...)
    add_agent!(random_position(model), A, model, properties...; kwargs...)
end

It appears this signature of add_agent! (L294 in space_interaction_API.jl) can't be used with nothing space

MWE:

mutable struct Agent1 <: AbstractAgent
    id::Int
end
model = ABM(Agent1)
add_age

We should be able to attach names to rules, so that normalization steps (and error messages?) can be better understood by users. For example:

normalize(@term(diff(x + y, x)))
 - @term(diff(x,x) + diff(y,x)) by sum rule in differentiation
 - @term(one(x) + diff(y, x)) by linear rule of differentiation
 - @term(1 + diff(y, x)) by multiplicative identity of a number
 - @term(1 + zero(x)) 

The current code does not support the domain-wall fermion, which
is widely used in lattice QCD.
The code has Wilson fermion and the domain-wall fermion can be realized by
multiple of Wilson fermions.