15 lines
363 B
Julia
15 lines
363 B
Julia
function fhn!(du, u, p::FHNParams, t)
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N, dx = p.N, p.dx
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u_mat = reshape(u[1:N^2], N, N)
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v_mat = reshape(u[N^2+1:end], N, N)
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Δu = laplacian(u_mat) / dx^2
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Δv = laplacian(v_mat) / dx^2
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fu = p.Du * Δu .+ u_mat .- u_mat .^ 3 ./ 3 .- v_mat
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fv = p.Dv * Δv .+ p.ε * (u_mat .+ p.a .- p.b .* v_mat)
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du .= vcat(vec(fu), vec(fv))
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end
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